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M42->MAF Adapter With Focus Confirmation

Printed From: Dyxum.com
Category: Equipment forums
Forum Name: Other mount lenses
Forum Description: Discussions for non alpha mount lenses
URL: http://www.dyxum.com/dforum/forum_posts.asp?TID=29573
Printed Date: 13 December 2017 at 03:28


Topic: M42->MAF Adapter With Focus Confirmation
Posted By: kiklop
Subject: M42->MAF Adapter With Focus Confirmation
Date Posted: 08 April 2008 at 14:01
Since this adapter is quite popular and interesting accessory i have decided to help James here with a bit of free advertising (a small banner is added to our free beaner rotator on the left).
Hopefully, this thread will also serve for any Q&A if needed.

I hope dyxum members won't mind having these banners in our forum but i feel obligated to "abuse" dyxum traffic and help a bit those who are working to make our system even better.


M42->MAF Adapter With Focus Confirmation

This M42-MAF electronic adapter has an electronic component that communicates with Minolta AF/Alpha SLR bodies in the same way as compatible lenses. When the camera is powered on, it reports data from the adapter to the body. Using the adapter, focus confirmation will be shown in the viewfinder and Anti-Shake/SSS will be effective (providing correct focal length information has been selected).

**       Preset Lens data (Only valid for Multiple Data Adapters)
1.        Switch off camera, mount the adapter and MF Lens
2.        Switch on camera – by multiple half-press and releases of the shutter button within 10 seconds you can select one of 4 focal length/aperture combinations (in order, 50/1.4, 85/1.4, 135/2.8 & 200/3.5).
3.        If you want to reset to the adapter at any time you should turn off the camera and repeat step 2

**       Operation
1.        Mount the adapter to camera body, set AF/MF switch to MF. Turn on camera.
2.        by multiple half-press and releases of the shutter button within 10 seconds you can select one of 4 focal length/aperture combinations (in order, 50/1.4, 85/1.4, 135/2.8 & 200/3.5).
3.        There are two ways to set aperture, you can set aperture value same as real Len’s aperture, then you can record right aperture value in Exif . the process steps are:
a)       Fully open the MF Lens aperture.
b)       Set the aperture value to the one you want.
c)        Half press shuttle button and adjust focus, the focus confirmation LED will light when in focus.
d)       Press AEL lock for a measured value.
e)       Set MF Lens aperture same as you set in step b).
f)        Take picture.
4.        The other way is very simple. Just set body’s aperture in minimum value. In this way, they will not record correct aperture in Exif. The steps are:
a)       Set body’s aperture to minimum value (wide open)
b)       Open the MF Lens aperture to ease focusing.
c)        Half press shuttle button and adjust focus, the focus confirmation LED will light when in focus.
d)       Set MF Lens aperture the desired value.
e)       Take picture.

**       Note:
1.        For maximum effect with AS/SSS, you should choose the same lens focal length as the MF lens being used; for instance, if you use a Takumar 50/1.4, set the Adaptor to AF50/1.4. When you use a 135/2.8 MF lens, set to AF135/2.8. If you are using a lens where the focal length is not one of the four available the effectiveness of AS/SSS may be less than optimal.
2.       Please note that rough treatment and handling of the M42-MAF adapter may effect alignment of electrical contacts.


http://eadpt.cn.webz.datasir.com/eadpen.htm - adapter home page

The above link has been reported as not working - please try http://eadpt.com/ - this one instead..

An older thread about this adapter can be found http://www.dyxum.com/dforum/forum_posts.asp?TID=21894 - here

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We may have http://www.dyxum.com/dforum/unawsered_forum_topics_date-range13.html - questions waiting for answers !



Replies:
Posted By: Arkku
Date Posted: 08 April 2008 at 14:25
As an additional tip, I find it's easier to get into the focal length selection mode if you first unmount the adapter from the camera while the power is still on (no need to take it off, just turn it far enough to disengage the electric contacts), then power off, wait a couple of seconds, remount adapter, power back on. Then start half-pressing the shutter (and keep turning the aperture control toward wide open, so you can see when it changes, as that is the best signal of which focal length is selected).

Also note that EyeStart AF can trigger the half-press, so when you have the correct setting selected, wait for a few seconds to be sure the selection mode is no longer active. (Otherwise EyeStart AF is good, for use with the focus confirmation.)

Personally I highly recommend the James Lao electric adapter, the latest generation is superb mechanically as well as electronically (I also have an earlier one which was not as good mechanically, but the new ones are at least as good as any others I've had).


Posted By: Gabriel
Date Posted: 08 April 2008 at 14:46
Trick -
how to get "focus trap" with your m42 lenses and James' adapter:

*Set your fire priority to focus priority instead of shutter priority within your camera config
*Set the camera to AF (yes, unfortunately the AF pin will make some grinding noise)
*Press shutter button, and keep it pressed
*Focus
*The shutter will only fire when the focus is correct

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Pic a day http://tinyurl.com/2008-p-a-d - 2008 / http://tinyurl.com/2009-pad - 2009 / http://gabriel.mp3-tech.org/pics/galleries/2010_pic_a_day - 2010 galleries


Posted By: KonicaA3
Date Posted: 08 April 2008 at 15:00
Thanks Mladen,
I am a James Lao fan as well and this is a great way to learn how to use these devices.

-------------
Sony A77ii | Sigma APO 75-300 F4-5.6 | Minolta 70-210 F4 | Tamron 18-250 F3.5-6.3 Di |Minolta 35-70 F4 | Minolta 100-200 F4.5 | Sigma 18-125 F3.5-5.6

http://www.flickr.com/people/imagesbykeith/


Posted By: revdocjim
Date Posted: 08 April 2008 at 15:18
I admit that I still struggle in selecting the right data set sometimes. If the aperture isn't set to wide open on the camera you have no way of immediately knowing which data set you are on as you scroll through them with half pushes of the shutter release button. But my experience is that if I rotate the front wheel to set the camera to max aperture it closes the time window for data selection and locks into which ever one you're on. So then I have to unmount, power down, power up again... Sometimes it takes me multiple tries before I get it. It doesn't help that my adapter is set for the 28/3.5, 50/1.4, 55/1.8 and 135/3.5 That means the first and last data sets have the same max aperture so it's really hard to know which one I'm on. I end up having to take a picture and check the exif to know for sure.

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http://revdocjim.smugmug.com/ - Gallery A7S, A7Rii, Batis 18/2.8, 25/2 Sony 35/2.8, 55/1.8, 90/2.8M, Minolta 135STF, 200/2.8 http://goo.gl/vMcLcr - Blog


Posted By: Gabriel
Date Posted: 08 April 2008 at 15:30
Originally posted by revdocjim revdocjim wrote:

I admit that I still struggle in selecting the right data set sometimes. If the aperture isn't set to wide open on the camera you have no way of immediately knowing which data set you are on as you scroll through them with half pushes of the shutter release button. But my experience is that if I rotate the front wheel to set the camera to max aperture it closes the time window for data selection and locks into which ever one you're on. So then I have to unmount, power down, power up again...

I share the same experience. However, even if I have to (partially) unmount the lens, I don't power down/up the camera. The process works fine with the camera kept powered on.

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Pic a day http://tinyurl.com/2008-p-a-d - 2008 / http://tinyurl.com/2009-pad - 2009 / http://gabriel.mp3-tech.org/pics/galleries/2010_pic_a_day - 2010 galleries


Posted By: gustavjensen
Date Posted: 08 April 2008 at 15:44
I am not sure I understand this post.
Is this an online manual for a product that can be bought ?
If yes, where can I buy it ?



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___________________________
http://www.gustavjensen.com - www.gustavjensen.com


Posted By: kiklop
Date Posted: 08 April 2008 at 15:49
Originally posted by gustavjensen gustavjensen wrote:

I am not sure I understand this post.
Is this an online manual for a product that can be bought ?
If yes, where can I buy it ?

My fault .. sorry; hopefully we will build here a nice summary about the whole thing.
Until then i added a link to an older thread about this topic.

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We may have http://www.dyxum.com/dforum/unawsered_forum_topics_date-range13.html - questions waiting for answers !


Posted By: JamesLaoT
Date Posted: 08 April 2008 at 18:22
Thanks kiklop's kindy help.
Thanks for friends' advices about the adapter since years ago.
Now the adapter with focus confirmating looks useful and powerful, there are a lot of your supports in it. Look the posts above, you give lots of skills usefully beyond my knowledge.
I'd like reply what i known about the adapter also.

Thanks again.

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http://eadpt.com/eadpen.htm - http://eadpt.com

M42 adapter with Focus Confirmation


Posted By: JamesLaoT
Date Posted: 08 April 2008 at 18:46
Originally posted by revdocjim revdocjim wrote:

I admit that I still struggle in selecting the right data set sometimes. If the aperture isn't set to wide open on the camera you have no way of immediately knowing which data set you are on as you scroll through them with half pushes of the shutter release button. But my experience is that if I rotate the front wheel to set the camera to max aperture it closes the time window for data selection and locks into which ever one you're on. So then I have to unmount, power down, power up again... Sometimes it takes me multiple tries before I get it. It doesn't help that my adapter is set for the 28/3.5, 50/1.4, 55/1.8 and 135/3.5 That means the first and last data sets have the same max aperture so it's really hard to know which one I'm on. I end up having to take a picture and check the exif to know for sure.

Sorry for your struggle.
There is a suggestion that you can remember the order of the data sets,for your adapter , this is 28/3.5, 50/1.4, 55/1.8 and 135/3.5 . When the first time the adapter was mounted. They must begin with 28/3.5 .So if half press->release the shutter button once, the data move to the next one in the fixed order.
If you want use the 35/3.5, you should wait above 10 seconds after the adapter mounted.
If you want use the 135/3.5, you should half press->release the shutter button three times and wait seconds after the adapter mounted.
When you familiar with this,should not set and check the max aperture.

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http://eadpt.com/eadpen.htm - http://eadpt.com

M42 adapter with Focus Confirmation


Posted By: Shaocaholica
Date Posted: 08 April 2008 at 19:54
Perhaps we should merge James' old sales thread and this thread. Also, it might be a good idea if James kept all of his Dyxum sales posted in the first post just so the members here who order can keep track of their order without constantly emailing/PM'ing James. Kind of like this
--------------------------------------------
Single ID Chip: $XX
Single ID Chipped M42 Adapter: $XX

Multi ID Chip: $XX
Multi ID Chipped M42 Adapter: $XX

memberXXX - [60/1.1]+[50/1.4,85/2,135/2.8,200/4] shipped
memberXXX - [50/1.4,85/2,135/2.8,200/4] shipped
memberXXX - [60/1.1] shipped
memberXXX - [60/1.4] pending
memberXXX - [35/2] pending


Posted By: Arkku
Date Posted: 08 April 2008 at 21:29
Originally posted by revdocjim revdocjim wrote:

But my experience is that if I rotate the front wheel to set the camera to max aperture it closes the time window for data selection and locks into which ever one you're on.


Doesn't do that for me, if I keep half-pressing enough times it will still work (as long as the whole thing happens in the 10 seconds or so). My usual power-up routine is half-pressing and rotating the wheel at the same time very fast until I see the aperture changing in the viewfinder. Then I slow down until I reach the correct value.

Originally posted by revdocjim revdocjim wrote:

It doesn't help that my adapter is set for the 28/3.5, 50/1.4, 55/1.8 and 135/3.5 That means the first and last data sets have the same max aperture so it's really hard to know which one I'm on.


Yes, I recommend everyone order an adapter with a different aperture for each focal length, even if it doesn't exactly match your lens. Or at the very least arrange the order of settings so that no two consecutive ones (which include first and last) have the same aperture.


Posted By: revdocjim
Date Posted: 09 April 2008 at 05:58
Originally posted by Arkku Arkku wrote:

Yes, I recommend everyone order an adapter with a different aperture for each focal length, even if it doesn't exactly match your lens. Or at the very least arrange the order of settings so that no two consecutive ones (which include first and last) have the same aperture.


I wasn't given the option of changing the order of data sets, and I wouldn't think it wise to intentionally select a max aperture that doesn't match the lens.

Since I really only use 3 of my M42 lenses, I've wondered if it wouldn't be easier to simply get a single lens adapter for each of them, with the appropriate data for each.

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http://revdocjim.smugmug.com/ - Gallery A7S, A7Rii, Batis 18/2.8, 25/2 Sony 35/2.8, 55/1.8, 90/2.8M, Minolta 135STF, 200/2.8 http://goo.gl/vMcLcr - Blog


Posted By: Arkku
Date Posted: 09 April 2008 at 11:14
Originally posted by revdocjim revdocjim wrote:

I wouldn't think it wise to intentionally select a max aperture that doesn't match the lens.


Why not? For the metering you'll probably be using M mode anyhow, or at least need to apply exposure compensation. The only problem might be having much too wide a maximum aperture so the focus confirm would become too sensitive (although doesn't seem problematic on the A100 using an f/4 with a reported f/2.8 or an f/2.8 with a reported f/1.1).


Posted By: revdocjim
Date Posted: 10 April 2008 at 13:51
You may be right Arkku. I don't fully understand this stuff so I guess I just instinctively play by the rules.

On another topic, just this evening I discovered a weird problem. I've always left the camera aperture setting at the max when using the James Lao adapter. I decided to try the other method described on the first page of this post, that allows you to have correct exif data. Here's what happened:

I had the camera set for the correct data set. I framed the picture, set aperture on camera to f/2.8 (on the f/1.4 lens), focused, pushed the AEL button. Set the aperture on the lens to f/2.8. Released the shutter. I got an error every time. I tried various things and found that regardless of the AEL button, any time I stopped down the camera aperture setting beyond a certain point I would get an error upon shutter release.

Camera: A700
Lens: 50/1.4 If I set the aperture on the camera to f/2 or smaller taking a picture makes the body lock up with an error. I have to power down the camera to get it going again and the recorded frame is black. The camera also makes a weird, almost chirping sound when trying to take the picture.

Lens: 135/3.5 Same thing. f/4 is okay but f/4.5 and smaller cause an error.

Lens: 28/3.5 Same thing but at a somewhat higher f-stop.

I thought it might be a camera problem with slow shutter speeds but nothing similar happens when I attach an AF lens.

I tried my M42 lenses with a generic, non-electronic adapter and although I can't set any aperture value I tried various shutter speeds and no problem.

Anyone know what this is...



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http://revdocjim.smugmug.com/ - Gallery A7S, A7Rii, Batis 18/2.8, 25/2 Sony 35/2.8, 55/1.8, 90/2.8M, Minolta 135STF, 200/2.8 http://goo.gl/vMcLcr - Blog


Posted By: JamesLaoT
Date Posted: 10 April 2008 at 15:22
Originally posted by revdocjim revdocjim wrote:

You may be right Arkku. I don't fully understand this stuff so I guess I just instinctively play by the rules.

On another topic, just this evening I discovered a weird problem. I've always left the camera aperture setting at the max when using the James Lao adapter. I decided to try the other method described on the first page of this post, that allows you to have correct exif data. Here's what happened:

I had the camera set for the correct data set. I framed the picture, set aperture on camera to f/2.8 (on the f/1.4 lens), focused, pushed the AEL button. Set the aperture on the lens to f/2.8. Released the shutter. I got an error every time. I tried various things and found that regardless of the AEL button, any time I stopped down the camera aperture setting beyond a certain point I would get an error upon shutter release.

Camera: A700
Lens: 50/1.4 If I set the aperture on the camera to f/2 or smaller taking a picture makes the body lock up with an error. I have to power down the camera to get it going again and the recorded frame is black. The camera also makes a weird, almost chirping sound when trying to take the picture.

Lens: 135/3.5 Same thing. f/4 is okay but f/4.5 and smaller cause an error.

Lens: 28/3.5 Same thing but at a somewhat higher f-stop.

I thought it might be a camera problem with slow shutter speeds but nothing similar happens when I attach an AF lens.

I tried my M42 lenses with a generic, non-electronic adapter and although I can't set any aperture value I tried various shutter speeds and no problem.

Anyone know what this is...


The error was reported by Arkku in :
http://www.dyxum.com/dforum/forum_posts.asp?TID=6242&PN=8
In my opinion,this error maybe caused by the len's thread. The thread of same lens are too fat,and blocked the apature driving arm.
I have done the experiment, confirmed, if use the adapter without the len. The error never appears.
Regarding different lens, The result is also different. Just as your reported. When use my takumar 50/1.4 , they work well. but use a AUTO REVUENON 50/1.8, this error will be observed.
So, I bend the apature driving arm outward a few . The error is solved.
Some of adapter's user successfully solved this problem as my way.


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http://eadpt.com/eadpen.htm - http://eadpt.com

M42 adapter with Focus Confirmation


Posted By: Arkku
Date Posted: 10 April 2008 at 19:14
I can verify that the error indeed disappears if you do not have a lens attached. Personally I left the aperture driving arm alone and just shoot with the camera set to wide open.


Posted By: Bob J
Date Posted: 11 April 2008 at 12:46
A bit of advice here - I'm tempted, but I'm not sure how much benefit there would be...   

How much benefit is there in using one of these adapters for a fish-eye?

I find absolute focus with this Zenitar that I've borrowed quite difficult to judge (although DoF is pretty good in any case) - Might focus confirmation help? I'm also interested in having AS working, at very least so that I don't have to remember to turn it off...

Also is there any benefit for exposure on matrix metering if the camera knows it is dealing with a fish?



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RBJ ~ http://tinyurl.com/h7uhozk - Moderation on Dyxum


Posted By: Ozoger
Date Posted: 15 April 2008 at 22:46
Will this adapter work with my Sigma 600mm f8 MF mirror lens? I would love to have SSS with it. I noticed some other semi-circular adapters, can I modify my Sigma in some way?

Also I noticed 600mm was not listed as a compatible focal length... ?

Thanks, it sounds great!

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A700/NEX-5/8mm Samyang/20-40 f2.8 sigma/50 f1.4/100 f2.8 macro RS/70-210 f4/600 f8 sigma/Slingshot100 http://www.flickr.com/photos/24016745@N07/ - flicker:ozoger


Posted By: Gabriel
Date Posted: 15 April 2008 at 23:08
Originally posted by Bob J Bob J wrote:

How much benefit is there in using one of these adapters for a fish-eye?

I can't really tell you if it helps for focus, as most of my shots with the 17mm Takumar fish are at infinity and f/8.
What I can tell, however, is that it allows me to go down to 0.5s with reliably good results (slower speed sometimes come out fine, but it's not really what I'd call "reliable")

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Pic a day http://tinyurl.com/2008-p-a-d - 2008 / http://tinyurl.com/2009-pad - 2009 / http://gabriel.mp3-tech.org/pics/galleries/2010_pic_a_day - 2010 galleries


Posted By: KonicaA3
Date Posted: 16 April 2008 at 01:20
Originally posted by Bob J Bob J wrote:

A bit of advice here - I'm tempted, but I'm not sure how much benefit there would be...   

How much benefit is there in using one of these adapters for a fish-eye?

I find absolute focus with this Zenitar that I've borrowed quite difficult to judge (although DoF is pretty good in any case) - Might focus confirmation help? I'm also interested in having AS working, at very least so that I don't have to remember to turn it off...

Also is there any benefit for exposure on matrix metering if the camera knows it is dealing with a fish?



Bob,
Don't know if it knows it is a fish, IMHO I doubt it, however, that said, it is invaluable with the a200, a300, a350 to allow using in Aperture mode as opposed to Manual only

Keith


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Sony A77ii | Sigma APO 75-300 F4-5.6 | Minolta 70-210 F4 | Tamron 18-250 F3.5-6.3 Di |Minolta 35-70 F4 | Minolta 100-200 F4.5 | Sigma 18-125 F3.5-5.6

http://www.flickr.com/people/imagesbykeith/


Posted By: pepesaspa
Date Posted: 28 April 2008 at 21:14
Anyone know if it works stabilizer with a goal 1000mm f10 as the MTO 10/1000?


Posted By: Bob J
Date Posted: 13 May 2008 at 18:01
He says he can input 1000mm and the aperture would not be critical to AS/SSS (although focus confirmation would not work of course).

I ended up ordering one of these for a 16/f2.8, and it seems to work very well - you have to remember to keep the camera thinking it is exposing at the highest aperture (f2.8) in my case, but it works very well.

An interesting side-note - with a film camera (or with my 800si at least), the camera recognises that the lens is MF only - with my 5D the AF blade will spin if I've forgotten to switch to MF, but the film body knows better - I guess this must be the adapter telling the camera not to bother with AF... makes me wonder what a digital body does with the STF - does it try to set it to infinity on startup?

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RBJ ~ http://tinyurl.com/h7uhozk - Moderation on Dyxum


Posted By: Bob J
Date Posted: 25 May 2008 at 13:00
A thought for anyone ordering one of these (and they are very good)...

You can get overexposure if the aperture on the camera is set to anything other than wide open (the actual lens diaphram can be set to whatever you like which is what really matters) - in a way it would be easier to avoid this if the adapter told the camera that the maximum and minimum aperture for the lens were the same - perhaps James might comment on whether this is possible/practical?

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RBJ ~ http://tinyurl.com/h7uhozk - Moderation on Dyxum


Posted By: JamesLaoT
Date Posted: 26 May 2008 at 05:03
Originally posted by Bob J Bob J wrote:

A thought for anyone ordering one of these (and they are very good)...

You can get overexposure if the aperture on the camera is set to anything other than wide open (the actual lens diaphram can be set to whatever you like which is what really matters) - in a way it would be easier to avoid this if the adapter told the camera that the maximum and minimum aperture for the lens were the same - perhaps James might comment on whether this is possible/practical?


There is a complex but the only right way to avoid overexposure and can record right aperture in Exif.
We can;
   1) Wide open M42 Len's aperture
   2) Set camera's aperture to what you want
   3) Focus and helf-press shuttle to check focus confirmation.
   4) Press AEL to lock exposure value
   5) Set M42 Len's aperture same as Step 2)
   6) Fire...

   In this way, What our did just as same as what the camera did when it use an AF len.
   Tips:
     1)Should Set camera in aperture priority (Mode A).
     2)From camera's menu, we can set AEL as press once for lock/unlock
:)


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http://eadpt.com/eadpen.htm - http://eadpt.com

M42 adapter with Focus Confirmation


Posted By: lionoche
Date Posted: 20 November 2008 at 14:31
Hi,

Considering to purchase one of these adpaters, I would like to know if the adapter makes the camera behaves like with SSM lens.
I am concerned about the AF motor of the body trying to drive the lens at start-up and making noise.

Clearly that is what I am talking about (taken from another M42 - Minolta AF adapter with focus confirm)

motor will starts and make a few seconds noise, to self-examine

Thanks in advance for your help

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http://www.flickr.com/photos/lionoche - http://www.flickr.com/photos/lionoche


Posted By: pegelli
Date Posted: 20 November 2008 at 14:39
I just tested on my A700 as well as KM5D with a JamesLaoT chipped adapter and clicking sounds is exactly the same as after switching on an AF lens focussed at infinity. There is no AF drive noise trying to get a (non-AF) lens back to infinity on either of the two cameras (Both cams were switched to MF)

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Mind the bandwidth of others, don't link pictures larger then 1024 wide or 960 pix high, http://www.dyxum.com/dforum/picture-size-for-posting_topic114856_post1379537.html#1379537 - see here


Posted By: lionoche
Date Posted: 20 November 2008 at 16:30
Hi,
Thanks for your answer !
Do you think this is specific to the JamesLaoT adapter ?
Do you get AF confirm from the camera even if the switch is in MF position ?
Clearly, the reason why I am asking is that I heard about this issue being specifically adressed sometimes ago.
Can anyboy confirm ?

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http://www.flickr.com/photos/lionoche - http://www.flickr.com/photos/lionoche


Posted By: Dorset Mike
Date Posted: 20 November 2008 at 16:42
Yes AF confirm works with the switch in MF, also when set to MF you don't usually get any AF drive at switch on.

I'm using a Haoda adapter and a cheapy Hong Kong one, (at least it was cheap before the exchange rate went haywire).




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Cheers MIKE,



5D, A350: 50/1.7; 28-75/2.8;80-200/2.8 APO Kit; 500/8; Tam 17-50/2.8; 18-280; 70-300/4-5.6: 90/2.8; MC7 2X; Tokina 11-16/2.8: 80-400/4-5.6; Kenko 1.4X:
Min A200 bridge


Posted By: lionoche
Date Posted: 21 November 2008 at 12:30
Thanks for your help Mike, appreciated !
Do both adapters you have also keep focus at infinity ?
What is the advantage of this Haoda over the cheapy version ?

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http://www.flickr.com/photos/lionoche - http://www.flickr.com/photos/lionoche


Posted By: Gabriel
Date Posted: 21 November 2008 at 13:32
Some cheap versions available on eBay exhibit the AF gear noise at start, while current JamesLaoT ones don't. (don't know about the Haoda one, but I've heard that it was very similar to the JamesLaoT one)

Advantage of JamesLaoT vs Haoda: JamesLaoT can set custom focal lengths within its adapters, you just have to ask him.

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Pic a day http://tinyurl.com/2008-p-a-d - 2008 / http://tinyurl.com/2009-pad - 2009 / http://gabriel.mp3-tech.org/pics/galleries/2010_pic_a_day - 2010 galleries


Posted By: Arkku
Date Posted: 21 November 2008 at 20:22
I have both the Haoda and James Lao adapters. I find the electronics of the James Lao adapter work better—it's easier to get into the focal-length-setting mode. The current James Lao version is mechanically almost exactly the same as the Haoda adapter. (I also have an older Lao adapter, which was different in this regard.) So, just get one from James Lao. =)


Posted By: krca
Date Posted: 22 November 2008 at 21:16
I've ordered James Lao adapter for 58mm F1.2 lens. It looks like nice solution for that lens. I'll post my impressions and sample photos after conversion.

P.S.
I have to wait a few weeks for delivery and of course, I can't wait, I'm impatient...   


Posted By: lionoche
Date Posted: 24 November 2008 at 14:27
Thanks a lot for all your help and feedback. Appreciated !

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http://www.flickr.com/photos/lionoche - http://www.flickr.com/photos/lionoche


Posted By: urban-wombat
Date Posted: 01 December 2008 at 02:27
Problems with the the 'adapter home page link'when I open it the page is in Chinese (okay that really isn't a problem) can do a translate.. ..that I did.. and the home page is for a web/ISP provider not the photographic adapter


Posted By: JamesLaoT
Date Posted: 01 December 2008 at 15:13
Originally posted by urban-wombat urban-wombat wrote:

Problems with the the 'adapter home page link'when I open it the page is in Chinese (okay that really isn't a problem) can do a translate.. ..that I did.. and the home page is for a web/ISP provider not the photographic adapter

Thanks for your post.
The webpage is working now.

Thanks again.

james

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http://eadpt.com/eadpen.htm - http://eadpt.com

M42 adapter with Focus Confirmation


Posted By: burple
Date Posted: 08 December 2008 at 06:27
Hi -- I'm looking for some help. Thanks in advance.

I am getting a frequent "camera error" problem using James's chipped adapter and A200. The error seems different from the one described by others in this forum. Here's all the relevant info I can think of.

The adapter is programmed for 60mm/f2 for use with a 58mm Helios 44-2. I can NOT create the error with this lens. Works perfectly.

However, I also want to use my Vivitar 28mm f2.5 lens (without AS), in order to get the focus assist. I plan to buy another adapter from James soon with the correct parameters for this lens, but in the meantime, is there any reason I shouldn't be able to use it on my Helios-spec Lao adapter (with AS off)? Because when using this combination -- and ONLY this combinatio -- I often get "camera error" and camera locks up.

It's apparently random -- I often get the error when shooting wide open, when stopped down, and it doesn't matter whether or not I tell the camera when the lens is stopped down. I get the error with lens set to Manual or on Automatic. I have set the lens to manual and taped the pin down just to make sure that it wasn't interfering with anything in the camera, and tried it at different apertures -- made no difference, I still got the error. Doesn't matter whether I have AS turned on or off either. Aperture-priority mode, manual mode -- doesn't matter. It's frequent but unpredictable. I can get a good shot and then get the error on the next shot without changing any parameters. I can't shoot more than 4 or 5 shots without getting an error, and sometimes I get a bunch in a row. Each time I get an error I have to turn the camera off and delete the black picture that was taken.

Since I only get the error with the Vivitar lens it doesn't seem to be a camera problem. Since I never get the error with the Helios it doesn't seem to be a problem with the adapter.

The only thing I can think of is that maybe the camera is confused by what it sees through a 28mm lens when it's being told that the lens is 60mm. But I have no idea why that would matter.

Can anyone enlighten me as to what is likely going on?


Posted By: pegelli
Date Posted: 08 December 2008 at 06:33
The only thing I can think of is that the pin for the aperture operation of the 28 mm lens is interfering with something else in the mount. Is it longer/thicker/different from the pin of the 58 mm helios ?

Edit: saw you taped the pin, so that can't be it. Other thought: does the lens stick out further "through" the ring so it can touch something else inside ?

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Mind the bandwidth of others, don't link pictures larger then 1024 wide or 960 pix high, http://www.dyxum.com/dforum/picture-size-for-posting_topic114856_post1379537.html#1379537 - see here


Posted By: Bob J
Date Posted: 08 December 2008 at 07:57
Don't think the problem can be related to the focal length - I use a JamesLao adapter for a 16/f2.8 with a variety of lenses up to and beyond 200mm. I think it has to be something to do with the depth of the thread of the Vivitar - either shorting out or forcing the adapter to lose contact with one or more of the pins in the camera.

Have you tried screwing both lenses (the one that works and the one that doesn't) into the adapter when it is off the camera and seeing what sort of difference there is between the amount that they protrude beyond the back of the adapter? Does the Vivitar still give the error if you only screw it in part way (I know this will prevent infinity focus, but it might help in diagnosis of the problem).

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RBJ ~ http://tinyurl.com/h7uhozk - Moderation on Dyxum


Posted By: Pete Ganzel
Date Posted: 08 December 2008 at 08:19
Hi Burple:

What camera?

Like the others have said probably something on the Vivitar mount interfering with the adapter or camera. I have had errors with my 7D if the aperture actuator hits something solid in it's travel. As the chipped adapter has fooled the camera into thinking that a AF lens is present, the actuator will move to the stop down position. Likely it is hitting something on the Vivitar lens. Can you try another (unchipped) adapter so the actuator doesn't move? If you get no error, that is the cause.

Pete


Posted By: burple
Date Posted: 08 December 2008 at 15:01
Hi guys, thanks for your quick responses.

@ Pete, the camera's a Sony A200.

I compared the helios mount with the Vivitar mount and the threaded part of the Viv mount is taller and extends farther into the camera.

I then screwed the Viv only part way in (a couple of turns, just enough to keep it from falling off), and took a couple dozen snaps. I did NOT get the error.

I had also been using the Viv with an unchipped adapter (before I got the JamesLao) and I never got the error.

So it seems that the Vivitar mount is interfering with the aperture actuator. It's not the aperture pin but the threaded barrel of the mount. So it looks like the Viv is just not compatible with any chipped adapter. Rats!

But my big worry now is -- did I do anything bad to the camera? I probably got the error a couple dozen times as I was trying to diagnose the problem.

Thanks again to all.



Posted By: burple
Date Posted: 08 December 2008 at 16:24
UPDATE -- SUCCESS!!!

Hey guys, in my last post I drew the wrong conclusion about what was happening. Indeed it was the threaded barrel of the Vivitar mount that was interfering with the aperture actuator lever -- but not because the barrel of the lens extended too far into the camera!

It turned out that the problem was the same one that James and others already discussed: the threads on the Viv are a little too "fat."

There's a little channel in the adapter for the actuator lever. One side of the channel is formed by the lens thread. If they are too fat, the actuator lever can scrape along the outside of the thread.

I examined the mechanism that the lever engages with in my AF lenses and concluded that if I bent the lever back just a teeny bit, it wouldn't adversely affect its normal operation, but would clear the threads on the Viv.

I took a deep breath and did it.

No more error! And my AF lenses still work fine.

Whew!


Posted By: Peekayoh
Date Posted: 20 January 2009 at 21:36
I realise that the in camera AS adjusts according to focal length, but how much leeway is there? For instance will a setting of say
28/f2 cope with 24/f2.8 and 35/f1.8
or a setting of
60/f1.2 cope with 50/f1.4 and 85/f2?


Posted By: Gabriel
Date Posted: 20 January 2009 at 22:44
Here is the list of focal lengths that you can manually enter within a k20d:

8-10-12-15-18-20-24-28-30-35-40-45-50-55-65-70-75-85-
100-120-135-150-180-200-250-300-350-400-450-500-550-600-700-800

As you can see, the margin is getting narrower at the wide end, so I'm not sure about using a setting of 28 for a 35mm lens. That being said, it is probably better to use a setting of 28 for a 35mm than using the default setting of 50mm.

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Pic a day http://tinyurl.com/2008-p-a-d - 2008 / http://tinyurl.com/2009-pad - 2009 / http://gabriel.mp3-tech.org/pics/galleries/2010_pic_a_day - 2010 galleries


Posted By: Peekayoh
Date Posted: 21 January 2009 at 10:18
My own feeling (gut not technical) was that the wider end may give more latitude seeing that the AS has to work harder at loger focal lengths.


Posted By: Gabriel
Date Posted: 21 January 2009 at 12:09
Originally posted by Peekayoh Peekayoh wrote:

My own feeling (gut not technical) was that the wider end may give more latitude seeing that the AS has to work harder at loger focal lengths.

Wich also imply that if your setting is not close enough to the real focal length, you'd better use a setting under the real focal length than over the real focal length.
(ie it would be better to use a 24mm setting for a 35mm lens than using a 35mm setting for a 24mm lens).

Stabilisation would be less effective than using the real focal length, but at least it will not overcompensate.
Extreme example: I can tell you than on a KM5d, using a setting of 500mm on a 135mm lens produces 90% of blurry pictures. Better not use stabilisation than using it with such an error within the settings.

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Pic a day http://tinyurl.com/2008-p-a-d - 2008 / http://tinyurl.com/2009-pad - 2009 / http://gabriel.mp3-tech.org/pics/galleries/2010_pic_a_day - 2010 galleries


Posted By: Peekayoh
Date Posted: 21 January 2009 at 14:53
Sounds logical. Pity there's no tech data; none that I could find anyway.


Posted By: Bob J
Date Posted: 21 January 2009 at 18:55
I use a chipped 16mm adapter quite happily with lenses up to 200mm - probably not as efficient as the correct FL for AS/SSS, but certainly no ill effects and focus confirm works fine.

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RBJ ~ http://tinyurl.com/h7uhozk - Moderation on Dyxum


Posted By: Gabriel
Date Posted: 21 January 2009 at 22:39
My guess is that a 16mm setting for 200mm is probably not doing much (except focus confirm), but it's nice to have a confirmation that there is no ill effects.

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Pic a day http://tinyurl.com/2008-p-a-d - 2008 / http://tinyurl.com/2009-pad - 2009 / http://gabriel.mp3-tech.org/pics/galleries/2010_pic_a_day - 2010 galleries


Posted By: Peekayoh
Date Posted: 23 January 2009 at 21:44
Thanks for the help guys. I'll just have to "suck it and see".


Posted By: lionoche
Date Posted: 17 February 2009 at 11:20
Hi,

I am about ordering the 4-lens version of the M42 to M-AF adapter.
For those who ordered from Europe or US, how long did you wait for delivery ?

Thanks for your help

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http://www.flickr.com/photos/lionoche - http://www.flickr.com/photos/lionoche


Posted By: pegelli
Date Posted: 17 February 2009 at 11:26
Usually about a week to Belgium (cheapest option). I only ordered the "one lens" version, so don't know if the four lens takes longer.

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Mind the bandwidth of others, don't link pictures larger then 1024 wide or 960 pix high, http://www.dyxum.com/dforum/picture-size-for-posting_topic114856_post1379537.html#1379537 - see here


Posted By: Peekayoh
Date Posted: 17 February 2009 at 11:27
I ordered 22nd Jan. I've had dispatch confirmation but still waiting.


Posted By: lionoche
Date Posted: 17 February 2009 at 11:40
Thanks gents !
Peekayoh, what version did you order ?
One requiring special programming of the chip ?

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http://www.flickr.com/photos/lionoche - http://www.flickr.com/photos/lionoche


Posted By: Peekayoh
Date Posted: 17 February 2009 at 11:46
Yes. The four focal length option.
BTW I got tracking number on 9th Feb. Unfortunately I don't read Mandarin.


Posted By: krca
Date Posted: 17 February 2009 at 12:54
I've got the adapter in five days (air-mail). It was very fast, I think.


Posted By: Peekayoh
Date Posted: 18 February 2009 at 23:32
The adapters arrived today in UK so that's 27 days after order placed.

Bad enough but I but there's a problem or I can't understand simple instructions.

Camera - A700, Adapter MD-L4 (len's data: 24/f2.8, 35/f1.8, 50/f1.4, 60/f1.1).

Power off A700, mount the adapter and MF Lens - result, A700 "chirps" and display shows no lens attached.
If I leave the A700 powered on, unmount and then remount lens - adapter is at 24mm (P1)
Power Off/On, single press - no change still at 24mm (P1)
Power Off/On,    two press - no change still at 24mm (P1)
Leave the A700 powered on, unmount/remount lens - adapter is now at 60mm (P4)
Power Off/On, single press - no change still at 60mm (P4)
Leave the A700 powered on, unmount/remount lens - adapter is still at 60mm (P4)

If I repeat the process
Power off a700, mount the adapter and MF Lens - result, A700 "chirps" and display shows no lens attached.
leave the A700 powered on, unmount/remount lens, single press - adapter is at 24mm (P1). I thought this may give me 35mm (P2) but no it's P1.
Leave the A700 switched on, unmount/remount lens - adapter is now at 24mm (P1)
Power Off/On, single press - no change still at 24mm (P1)

What am I doing wrong, if anything?


Posted By: Peekayoh
Date Posted: 19 February 2009 at 10:24
OK, we can forget the last post.
Although there was no explanation in the delivery, it appears that the lens data order is not what I asked for.
It is now 60/f1.1, 24/f2.8, 35/f1.8, 50/f1.4 - Apparently the largest aperture has to be first.
This is not a problem if you know what's going on and now the changing data makes sense.

I find that the A700 needs to be powered on when you install the adapter and lens. If not the A700 simply "chirps" until you execute an Unmount/Mount of the adapter with the power on.

Having done that if you look at the LCD screen and use the "eye-start" function instead of the "half press" shutter, you can see the aperture change on the top line of the LCD. The half press works as well but you don't accidentally trigger the shutter.

So, panic over and now I can't wait to try it out in the field.


Posted By: thePiRaTE!!
Date Posted: 20 February 2009 at 18:25
Hi all. I've been using my adapter on my A900 for a week now and I definately have a problem. Hoping someone can shed some light.

I've followed the instructions for mounting (camera off, switch to MF, mount lens, turn on) The problem is that the camera just keeps trying to initialize the AF motor, clicking away and won't stop. If I unmount and remount the lens a few times, it eventually goes away and I can use the adapter normally, but it never gives AF confirmation. I've tried in Av and M mode with the same result.

Do I have a bad copy?

Secondly, I do have to say thanks for making these available though, I understand that if it works, it will be very helpful. I hope you'll consider to make some for Exakta - A someday.

Kelly.


Posted By: KonicaA3
Date Posted: 20 February 2009 at 19:00
I use it with my A200 without issue, however, must put switch to manual. The shutter button must be held half way down for focus confirm to work.

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Sony A77ii | Sigma APO 75-300 F4-5.6 | Minolta 70-210 F4 | Tamron 18-250 F3.5-6.3 Di |Minolta 35-70 F4 | Minolta 100-200 F4.5 | Sigma 18-125 F3.5-5.6

http://www.flickr.com/people/imagesbykeith/


Posted By: Peekayoh
Date Posted: 20 February 2009 at 19:45
Are you sure the noise is from the AF system? My A700 does not start the AF system when in Manual AF, don't see why the A900 should be any different.

The a700 has to be powered on when you mount the adapter otherwise it just "chirps" and there is a flashing line on the LCD where the f-number is displayed when the lens is recognised.

I use mine in A mode and the Focus confirm works whether the shutter button is half pressed or not.

BTW I've just been trying out my MD Macro lens and it works a treat.


Posted By: thePiRaTE!!
Date Posted: 20 February 2009 at 20:14
Ok, I've tried mounting with the camera on and off. Its the same result as before, and no chirp from this A900. Just the motor screw grinding over and over - tick, tick, tick. If I mount an autofocus lens on the body - even in MF mode - it will initialize the AF screw and wind the lens back to infinity, so this reaction in MF mode is normal, for the A900 at least.

The adapter will work if I let the camera do this process of initializing helplessly once, but then I must unmount and remount the adapter while leaving the camera on each time. Then it functions normally.

Also, I noted that focus confirm dot does light up, but no beep (this is the same behavior if I use an AF lens manually, though using AF for an AF lens does trigger the beep). I have to say that overall though, I don't find the dot helpful, it has a wider tolerance for focus than my eyes, so I don't trust the dot to my own instict with the A900 viewfinder, but thats another story :) As long as the SR is working properly is my main concern.

K.


Posted By: Peekayoh
Date Posted: 20 February 2009 at 20:25
OK. You can hear the A700 engage the AF but doesn't seem to wind and certainly no useless winding with the Adapter.
There is no "beep" on mine, just the dot.


Posted By: thePiRaTE!!
Date Posted: 21 February 2009 at 15:57

Are there any other A900 users with this adapter? Does it do the same for you?

I have found a solution I can live with - turn on the camera before mounting the adapter, then it works on the first try.

Not sure if you are reading this still James, perhaps it is worth a mention on the instructions page if all A900s perform in this way. I really thought something was faulty at first. And thanks again for making this!

Regards,


Kelly.


Posted By: JamesLaoT
Date Posted: 22 February 2009 at 15:57
Hi Kelly,
Thank you for providing a detailed approach to using the experience and treatment. I think you are right. For some new SONY DSLR, such as a700 upgrade with new firmware,a900. Should power on the body first,and mount the adapter later. Then it will work well.
So please give us more experience and other useful tips.

Thanks.

james
Originally posted by thePiRaTE!! thePiRaTE!! wrote:


Are there any other A900 users with this adapter? Does it do the same for you?

I have found a solution I can live with - turn on the camera before mounting the adapter, then it works on the first try.

Not sure if you are reading this still James, perhaps it is worth a mention on the instructions page if all A900s perform in this way. I really thought something was faulty at first. And thanks again for making this!

Regards,


Kelly.



-------------
http://eadpt.com/eadpen.htm - http://eadpt.com

M42 adapter with Focus Confirmation


Posted By: Quietman
Date Posted: 22 February 2009 at 16:22
I originally had the Haoda 4 Focal Length adapter for use with the A100.   It worked well but, as noted elsewhwere, the multi FL adapters can be a bit finicky to use.   When I purchased my A700 I found the same "chirping" problem.    As far as I recall mounting the adapter while powered on didn't work to resolve the issue.

I finally ordered several of James' single FL adapters, programmed with the aperture and FL for each lens.   This is a more expensive approach but well worth the extra cost.   I currently have the adapters on a 135/2.5, 200/4.0, and 400/5.6. It makes using each lens almost as natural as working with the standard A mount lenses.   I highly recommend them.    I'll likely be ordering a few more soon to go with my shorter lenses.



-------------
... Quietman





Posted By: Arkku
Date Posted: 22 February 2009 at 16:29
I have both the Haoda 4 focal length adapter and two James Lao 4 focal length adapters. The Haoda adapter has a problem where the adapter must be mounted with the camera (A100) turned off, otherwise it keeps chirping forever. This is very annoying if one accidentally presses the lens release and thereby puts the adapter into “chirping mode”. Both James Lao adapters can be mounted with the camera on or off, no chirping.


Posted By: Quietman
Date Posted: 22 February 2009 at 16:47
Thanks for the explanation Arkku.   I was pretty sure that was the behaviour I'd experienced.   After using the single FL adapters I haven't been tempted to tinker with the 4 FL since.

-------------
... Quietman





Posted By: Peekayoh
Date Posted: 22 February 2009 at 18:54
I just thought I should say that I have the 4x Adapter on my A700 and it works exactly as promised.


Posted By: thePiRaTE!!
Date Posted: 23 February 2009 at 16:10
Hi James, thanks for the confirmation on that. Is it possible to request an Exakta/Topcon to A-mount chipped adapter? I think it could be a strong product since Canon is the only other DSLR brand out there that can currently use the lenses at infinity.

K.


Posted By: Bob J
Date Posted: 23 February 2009 at 16:51
The EOS registration distance is 44mm, giving 0.7mm to play with for the tickness of the adapter - The Alpha mount is 44.5mm, so you would only have 0.2mm to play with.

James Lao does the chips seperately, so if you got an adapter made if would be possible to fit one of his chips to it...

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RBJ ~ http://tinyurl.com/h7uhozk - Moderation on Dyxum


Posted By: lionoche
Date Posted: 01 March 2009 at 01:41
Received mine (4 lens version) yesterday (very fast shipping, thanks) and exactly the same tik-tik-tik behavior as described above.
Mounting the adapter after powering the camera is ok, but when I try to change the aperture in my camera to match the real aperture of the lens (for example I set lens to f/8 and camera in A mode to f/8) I get a camera error and have to power down the camera.
Is this normal behavior with A700 firmware 4 ?

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http://www.flickr.com/photos/lionoche - http://www.flickr.com/photos/lionoche


Posted By: Peekayoh
Date Posted: 01 March 2009 at 01:51
I'm using A700 with v4 firmware. I have no problem with the adapter covering the 24 to 60mm focals, certainly never had a "camera error"

I also have one covering longer focal length and may have an issue with it but agin no "camera error".


Posted By: lionoche
Date Posted: 01 March 2009 at 02:00
Thans for your answer. Setting up the adpater is ok. I get the minimal aperture programmed right, like f/1.1, f/1.4, f/2.2 and f/2.8
To take picture, in A mode, I have to stay to this minimal aperture(camera software, not physical aperture of the lens) and I cannot change it to higher value. Else taking the shot, the message camera error appears on the screen and there is no other possibility than powering down the camera.
Any thought of what this issue could be ?

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http://www.flickr.com/photos/lionoche - http://www.flickr.com/photos/lionoche


Posted By: Arkku
Date Posted: 01 March 2009 at 03:18
The error message from changing the aperture on the camera is due to the aperture actuator hitting the lens. It can be solved by bending the actuator on the camera (or filing it down sufficiently). However, there should be little need for this—the camera assumes for metering that the lens is always wide open, so if metering will be off if you select the actual aperture in the camera. You should always select wide open in camera even if you are actually stopping it down. (I do realise it might be beneficial in M mode to record the used aperture by changing it on the camera, but in practice find it more trouble than it's worth…)


Posted By: Arkku
Date Posted: 01 March 2009 at 03:19
(BTW, if you put just the adapter on the camera, without a lens, you should be able to choose any aperture and not get the error message. This confirms that the problem is due to the lens.)


Posted By: Peekayoh
Date Posted: 01 March 2009 at 12:17
I'm using the MD adapter so this is not an issue for me.
I do however use the meter so I need to be able to adjust the aperture on camera.


Posted By: Arkku
Date Posted: 01 March 2009 at 14:40
Originally posted by Peekayoh Peekayoh wrote:

I'm using the MD adapter so this is not an issue for me.
I do however use the meter so I need to be able to adjust the aperture on camera.


Umm, you specifically do not need to adjust the aperture on the camera if you use the meter. The camera thinks that the lens is always wide open when it is metering, so the aperture setting on the camera is telling the meter “the lens will be stopped down this much when the shot is actually taken”. So, if your lens is an f/2 and the adapter has f/2 as the widest programmed aperture, and you first stop down your lens to f/8 and then set the camera to f/8, the meter will read the amount of light through the lens (which is at f/8), think that the lens is at f/2, and give you a meter reading for f/32 (leading to dramatic overexposure, by the difference of the programmed aperture and the setting you used).

So, you can just set the widest aperture on the camera (regardless of whether or not it matches that of the lens) and only set the aperture on the lens. Alternatively, if the programmed aperture in the adapter exactly matches that of your lens (or you apply exposure compensation accordingly), you could always meter with the lens wide open (like AF lenses) with the aperture set in camera, then lock exposure (or use M mode), and only then stop down the lens. This is more convenient with lenses having an auto/manual aperture switch, though (faster and easier to toggle between wide open and shooting aperture). Personally I have not encountered problems just shooting the camera set to the (adapter's) widest aperture, even in low light, so that's definitely the easiest way (only need to set the aperture in one place).


Posted By: Quietman
Date Posted: 01 March 2009 at 16:45
I second Arkku's point.   

Shooting with the camera set to the widest aperture allows the correct metering and stops the "camera error" message from occurring.    I'm not comfortable with modifying the actuator on my A700 body but have never had the error using the procedure he describes.    





-------------
... Quietman





Posted By: Peekayoh
Date Posted: 01 March 2009 at 17:05
I guess I wasn't being clear. I like to set the aperture on camera so it records correct XIF. You're right, it's quicker to leave the camera wide open, it cuts out an operation.



Posted By: lionoche
Date Posted: 02 March 2009 at 15:35
Thanks guys for your support. The issue is caused by my Helios M-40 and the actuator hitting the back of the lens.
Instead of modifying the camera, I'll probably modify the lens itself (digging a small hole in the back where the adapter fits)
Feedback about delivery time to Europe: less than a week. Well done !

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http://www.flickr.com/photos/lionoche - http://www.flickr.com/photos/lionoche


Posted By: Erty0
Date Posted: 05 March 2009 at 20:39
i want to order but website is down?

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α507SI Minolta AF APO 100-300mm f/4.5-5.6, Minolta 100/2.8 af macro, Sigma 24/2.8 AF, Fujinon 55/1.8, 500/8, Minolta flashmeter III, Fuji GW670II, Leica M4-P, M2, AE-1P and more


Posted By: JamesLaoT
Date Posted: 07 March 2009 at 14:34
Originally posted by Erty0 Erty0 wrote:

i want to order but website is down?

Sorry for my website is down,I will move it to eadpt.com next week.
or please order from my temporary http://eadpt.cn.webz.datasir.com/eadpen.htm
Thanks,

james


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http://eadpt.com/eadpen.htm - http://eadpt.com

M42 adapter with Focus Confirmation


Posted By: JamesLaoT
Date Posted: 10 March 2009 at 16:14
Originally posted by JamesLaoT JamesLaoT wrote:


Sorry for my website is down,I will move it to eadpt.com next week.
or please order from my temporary http://eadpt.cn.webz.datasir.com/eadpen.htm
Thanks,

james


Now, the website was change as eadpt.com/eadpen.htm , it working.
Thanks everyone.

-------------
http://eadpt.com/eadpen.htm - http://eadpt.com

M42 adapter with Focus Confirmation


Posted By: ponisch
Date Posted: 16 March 2009 at 15:30
I don´t know how to describe my questions but I give it a go:

Adapters that does give AF-confirm is the most useful, and offers more featuers than others?

I have read about some guy who bought an AF-confim adapter but it only worked i M mode, aren´t they supposed to work in A mode aswell?

/Jonas

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A700 | VG-C70AM | Tamron 17-50/2.8 | CZJ 35/2.4 | Sigma 50/1.4 HSM | Tamron 90/2.8


Posted By: JamesLaoT
Date Posted: 16 March 2009 at 17:42
Originally posted by ponisch ponisch wrote:

I don´t know how to describe my questions but I give it a go:

Adapters that does give AF-confirm is the most useful, and offers more featuers than others?

I have read about some guy who bought an AF-confim adapter but it only worked i M mode, aren´t they supposed to work in A mode aswell?

/Jonas

Hi Jonas
In general,my adapter can skip AF motor noise when DSLR power on/off.
Could provide customize len's data inside adapter for AS/SSS.
Also provide four sets customize len's data version adapter.


-------------
http://eadpt.com/eadpen.htm - http://eadpt.com

M42 adapter with Focus Confirmation


Posted By: Arkku
Date Posted: 16 March 2009 at 18:50
Originally posted by ponisch ponisch wrote:


Adapters that does give AF-confirm is the most useful, and offers more featuers than others?


The major feature gained by the use of these adapters is the ability to use SteadyShot image stabilisation properly. SteadyShot requires knowledge of the approximate focal length of the lens, and Sony chose not to implement a way to tell the camera this without an electric adapter (unlike Pentax). So, you should get an adapter with the programmed focal length approximately matching that of your lens(es). JamesLao can make you custom ones with four focal lengths per adapter.

For just the AF confirm, programmed focal length doesn't matter that much, although I believe the camera may tune the sensitivity by this information. In any case, the AF confirm just helps focusing, it usually doesn't get it correct on its own (i.e. the confirm dot lights up over a small range of focus, and final focusing needs to be done by eye, especially with wide apertures).


Originally posted by ponisch ponisch wrote:

I have read about some guy who bought an AF-confim adapter but it only worked i M mode, aren´t they supposed to work in A mode aswell?


Since the adapter works by fooling the camera into thinking that an AF lens is attached, all modes are selectable (even ones like S, P, and auto, though they obviously cannot work without being able to control the aperture on the lens)… I think you may be confusing this with the non-electric adapters used on A200, A300, A350, or the A900, which do not allow A mode to be used. A100 and A700 allow A mode even without an electric adapter. Or, the person may have had problems getting proper exposure in A mode, but this should be solvable by exposure compensation. (It is important to select the widest programmed aperture in the camera in A mode—not the aperture of the lens or the one the shot is going to be taken with).


Posted By: ponisch
Date Posted: 16 March 2009 at 20:20
Originally posted by Arkku Arkku wrote:

[/QUO


So there is only one adapter "on the market" that makes M42-lenses work with SSS, and that´s the one from James Laos?

Thanks for the info!

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A700 | VG-C70AM | Tamron 17-50/2.8 | CZJ 35/2.4 | Sigma 50/1.4 HSM | Tamron 90/2.8


Posted By: troublestylist
Date Posted: 16 March 2009 at 20:53
Originally posted by ponisch ponisch wrote:

Originally posted by Arkku Arkku wrote:



So there is only one adapter "on the market" that makes M42-lenses work with SSS, and that´s the one from James Laos?

Thanks for the info!


No, any chipped adapter will enable SSS. Even the cheapest ones have to send a focal length and aperture to the camera. Mine is 50mm and f/1.7.

Mine does allow the AF to spin to try to initialize the lens, so it sounds like that feature is a bonus with James's model. Obviously, also if you are using a different focal length, then having that feature is beneficial.

I use one for my 58mm f/1.2, and have a second one to use eventually with a Mirex adapter.

Greg


Posted By: ponisch
Date Posted: 16 March 2009 at 20:57
So I need to buy different adapters if I have different M42-lenses?

Sorry if I don´t get it

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A700 | VG-C70AM | Tamron 17-50/2.8 | CZJ 35/2.4 | Sigma 50/1.4 HSM | Tamron 90/2.8


Posted By: troublestylist
Date Posted: 16 March 2009 at 21:02
Aha, no. My first one is permanently mounted to the 58mm, as it's not an M42 lens. It just so happens that the diameter of the rear element of the 58mm f/1.2 is so large that it's close to the M42 mount diameter.

So the narrow pin contact pad provided on the M42 chipped adapter has enough clearance for the element, vs. any existing Maxxum rear plate and 50mm chip (f/1.7 or f/1.4) will interfere.

Greg


Posted By: ponisch
Date Posted: 16 March 2009 at 21:06
I ment like, do I have to buy different adapters so the SSS can work, for example if I have 1 58/2 and 1 50/1.4, or why do James Laos' adapters have "four focal/aperture combinations"?

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A700 | VG-C70AM | Tamron 17-50/2.8 | CZJ 35/2.4 | Sigma 50/1.4 HSM | Tamron 90/2.8


Posted By: troublestylist
Date Posted: 16 March 2009 at 21:15
His appear to be reprogrammable on the camera. But check the homepage and click on his link to confirm (no pun intended )

Greg


Posted By: Arkku
Date Posted: 16 March 2009 at 21:53
Originally posted by ponisch ponisch wrote:

I ment like, do I have to buy different adapters so the SSS can work, for example if I have 1 58/2 and 1 50/1.4, or why do James Laos' adapters have "four focal/aperture combinations"?


Any electric adapter repors some focal length to the camera. If this focal length is exactly right, SteadyShot will work “exactly right” as well. If it's not quite right, SteadyShot will still work as it would for the programmed focal length. This means that if your adapter says that it's a 50mm lens and you use it with a 58mm lens, the SteadyShot compensation will be slightly less than it should be for the amount of shake, but is certainly close enough to be effective. If you put on a 135mm lens and the adapter still says 50mm, SteadyShot will still work, but not nearly as effectively as if the adapter said 135mm… So, the closer your programmed focal length matches the lens, the more effective SteadyShot will be.

You don't need a different adapter for every lens… Personally I have a lot of lenses and I make do fine with two adapters: 18mm, 35mm, 50mm and 90mm + 55mm, 85mm, 135mm, and 200mm. Most people could do just fine without the 18mm (I got it because I like the 19mm EBC Fujinon) and the 50/55mm separation is totally unnecessary for lenses 50-58mm (but I find it helps to have that setting on both my adapters because I like that focal length very much).


Posted By: ponisch
Date Posted: 16 March 2009 at 22:00
Oh, thanks for the explanation Arkku, that was the "one" I was looking for

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A700 | VG-C70AM | Tamron 17-50/2.8 | CZJ 35/2.4 | Sigma 50/1.4 HSM | Tamron 90/2.8


Posted By: photoclubalpha
Date Posted: 28 March 2009 at 16:13
James, tried your new site again and getting bad domain message. The temporary URL is working though.

Do you know if your small chip (similar to the one I ordered for the Sigma 400mm f/5.6 - see http://www.photoclubalpha.com/2009/03/06/sigma-classic-400mm-tele-quick-rechip/ - http://www.photoclubalpha.com/2009/03/06/sigma-classic-400mm-tele-quick-rechip/ ) can be fitted to the Samyang/Vivitar/etc 85mm f/1.4 Korean lens, maybe by glueing? This lens has no chip at all and therefore transmits no EXIF data, no data for SSS, and no focus confirmation.

David

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Minolta Club of Great Britain - surviving the APOcalypse!


Posted By: JamesLaoT
Date Posted: 30 March 2009 at 18:26
Originally posted by minoltaclubuk minoltaclubuk wrote:

James, tried your new site again and getting bad domain message. The temporary URL is working though.

Do you know if your small chip (similar to the one I ordered for the Sigma 400mm f/5.6 - see http://www.photoclubalpha.com/2009/03/06/sigma-classic-400mm-tele-quick-rechip/ - http://www.photoclubalpha.com/2009/03/06/sigma-classic-400mm-tele-quick-rechip/ ) can be fitted to the Samyang/Vivitar/etc 85mm f/1.4 Korean lens, maybe by glueing? This lens has no chip at all and therefore transmits no EXIF data, no data for SSS, and no focus confirmation.

David

Sorry my eadpt.com was hijacked by someone. Fortunately old Domain eadpt.cn has been completed the registration procedures. It's running now.
Very thanks for your rechip post link.
The small chip can be fitted to the Samyang 85/f1.4 Korean lens. just like Shao did in http://shaozhang.smugmug.com/gallery/4630693_jPsbU#273263398 .

james

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http://eadpt.com/eadpen.htm - http://eadpt.com

M42 adapter with Focus Confirmation


Posted By: skimz
Date Posted: 06 May 2009 at 09:04
Im sorry if there i something i have missed, but what is the difference between the M42-L1 and the M43-L4 adapters?

I may buy a Jupiter9 85mm f2.8 lens, and a CZJ 135mm F3.5 lens, do i have to buy to different adapters then?

I have an a300 btw, can i program the focal lenght so the SSS work properly on both lenses?

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Workstation - 26" + 20" wide skjermer
Sony A300 camera - Verticalgrip - Sigma 28mm f/1.8 EX DG Macro - Minolta AF 50mm f/1.7 - HVL-F42AM Blitz - SanDisk ex III 4gb - Kingston ep 4gb


Posted By: JamesLaoT
Date Posted: 07 May 2009 at 07:52
Originally posted by skimz skimz wrote:

Im sorry if there i something i have missed, but what is the difference between the M42-L1 and the M43-L4 adapters?

I may buy a Jupiter9 85mm f2.8 lens, and a CZJ 135mm F3.5 lens, do i have to buy to different adapters then?

I have an a300 btw, can i program the focal lenght so the SSS work properly on both lenses?

M42-L2 have four sets lens data inside. So they can support four lens with different focal has SSS/AS ability working together with Sony/KM DSLR. The focal value (and MAX aperture) should be assigned when order the M42-L4 adapter.
You can use a M42-L4 for your two lens for SSS.



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http://eadpt.com/eadpen.htm - http://eadpt.com

M42 adapter with Focus Confirmation


Posted By: sofakingon
Date Posted: 24 May 2009 at 02:50
I can't for the life of me get focus confirm to work. SSS and lens data reporting works fine. I've read this forum for the last hour and tried everyting, mounting and remounting then switching to AF from MF, etc.... Any ideas? I've got James Lao's adapter with a Minolta Rokkor 58mm f1.2.

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A99(Pending)/VG+2xHVL-58AM/HVL-F42AM/Minolta 50 1.4/58 1.2/85 1.4/80-200 APO HS G/STF/Sigma 24-70HSM



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