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m42 adapter modification

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trondeh View Drop Down
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Post Options Post Options   Quote trondeh Quote  Post ReplyReply Direct Link To This Post Posted: 29 May 2006 at 11:59
Any news on these modified/new adapters that actually fits?

I bought the M42 adapter from Roxen, but that was much to tight on my 7D. I returned it for a full refund. I see on this forum that I can "tweak" one to fit, but would rather buy one that actually fit without having to mess with it.
Trond Hagescter

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tonilupi View Drop Down
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Post Options Post Options   Quote tonilupi Quote  Post ReplyReply Direct Link To This Post Posted: 24 June 2006 at 23:52
Originally posted by trondeh trondeh wrote:

Any news on these modified/new adapters that actually fits?

I bought the M42 adapter from Roxen, but that was much to tight on my 7D. I returned it for a full refund. I see on this forum that I can "tweak" one to fit, but would rather buy one that actually fit without having to mess with it.


I bought a M42 adapter from Roxen in this mounth (june), for a 7D too and they send me a adaptor that is not possible to mount in the 7D.

I modified the adapter sanding the external ring and then I was able to put it in the camera but my actual problem is the adaptor turn more degrees clokwise and now is impossible to turn anticlokwise.

What can I do???

Thanks.
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Post Options Post Options   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 25 June 2006 at 00:59
hi tonilupi, welcome.
i haven't use roxen, but basically adapter design is similar. first some question, maybe it could help.

a. i suggest you observe the situation without lens attached.
b. also it help to observe and make comparison of your minolta af lens.
c. do you remember whether the adapter has small screw on it's neck, just like your minolta af lens.
d. did the adapter give positive click when mounted, did the lens lock pin engaged?
e. is pushing lens release button give any help?
f. do you observe whether camera aperture pin make any contact with adapter? did you use small app. with af lens just before mounting the adapter?
g. might it be that the adapter still too tight? that you could not unmounted it easily; could you grab it with towel or thin rubber mat?

i'll try to help, please be patient with your camera. i've similar experience once with broken lens mount.
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leonardo View Drop Down
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Post Options Post Options   Quote leonardo Quote  Post ReplyReply Direct Link To This Post Posted: 06 October 2006 at 15:51
- - - Bumping thread - - -

Any progress?
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KonicaA3 View Drop Down
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Post Options Post Options   Quote KonicaA3 Quote  Post ReplyReply Direct Link To This Post Posted: 06 October 2006 at 16:18
I am still looking for a properly working, inexpensive adapter. Will be very interested in seeing the Dyxum inspired version.
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

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Post Options Post Options   Quote Timbuctoo Quote  Post ReplyReply Direct Link To This Post Posted: 23 November 2006 at 07:40
So if the adaptor attaches to the 7Ds lens mount okay then I don't need to sand the side facing the lens mount? So I only need to take 0.19mm (or there abouts) off the face of the adaptor facing the lens to achieve infinity? Hmmm, I guess I'll just keep sanding it and when I think I've taken enough off I'll do a Jpeg shot at infinity to test, if the result it still out of focus I guess I need to sand more off!! I'm thinking that it would be impossible to take to much off because the lens natural position is flat against the lens mount. It is the same reason the extension tubes take away infinity focus.
 



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Timbuctoo View Drop Down
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Post Options Post Options   Quote Timbuctoo Quote  Post ReplyReply Direct Link To This Post Posted: 15 December 2006 at 03:31
Hey Nur: Any news on that M42 Adaptor being made to your specs? I'd like to use my Takuma 50 f1.4 for this 50mm dyxum contest. I'm also looking forward to giving my 128mm M42 lens a go and do a review.
The waiting game is evil!!
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Bob J View Drop Down
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Post Options Post Options   Quote Bob J Quote  Post ReplyReply Direct Link To This Post Posted: 15 December 2006 at 10:20
I also had to take about two tenths off my adapter - as M42 is 1mm pitch you can judge how close you are by attaching a lens and seeing how far part the top the centre focus of the lens ends up - this is quicker than cleaning the adapter up, attaching it to a camera and remeasuring the tolerances there. I ended up taking mine down far enough so that the focusing mark on the lens sits at about the 3 o'clock position - this looks a little weird, but is fine to use.

Bob
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karaatanasov View Drop Down
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Post Options Post Options   Quote karaatanasov Quote  Post ReplyReply Direct Link To This Post Posted: 14 January 2007 at 21:19
How big of a problem is the fact your lens does not stay in its intended position? i.e. the markings are at 3 o'clock not 12
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Bob J View Drop Down
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Post Options Post Options   Quote Bob J Quote  Post ReplyReply Direct Link To This Post Posted: 14 January 2007 at 23:05
Originally posted by karaatanasov karaatanasov wrote:

How big of a problem is the fact your lens does not stay in its intended position? i.e. the markings are at 3 o'clock not 12


No big hastle at all - I ended up using the degree of rotation as an easy way of assessing how much I had taken off - 1 revolution = 1mm so 1/4 = 0.25mm...

Bob
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rjmccutchan View Drop Down
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Post Options Post Options   Quote rjmccutchan Quote  Post ReplyReply Direct Link To This Post Posted: 23 January 2007 at 17:12
I guess maybe I don't understand the infinity issue. I have a Bower adapter and the lens itself focuses to infinity, but does that mean it doesn't actually focus to infinity in the camera? Is the lens set too far forward while attached to the adapter? I don't do much at infinity, but I sometimes do.
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Post Options Post Options   Quote KonicaA3 Quote  Post ReplyReply Direct Link To This Post Posted: 23 January 2007 at 17:21
Originally posted by rjmccutchan rjmccutchan wrote:

I guess maybe I don't understand the infinity issue. I have a Bower adapter and the lens itself focuses to infinity, but does that mean it doesn't actually focus to infinity in the camera? Is the lens set too far forward while attached to the adapter? I don't do much at infinity, but I sometimes do.


Does not matter what you read on the lens, try to focus on something through the viewfinder that is more than say 20 ft away. The bower adapter will not focus to infinity and is too tight to the camera unless you modify it.
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/
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rjmccutchan View Drop Down
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Post Options Post Options   Quote rjmccutchan Quote  Post ReplyReply Direct Link To This Post Posted: 23 January 2007 at 17:58
Now I finally understand Nur's diagram! And I see now what everyone is talking about. Tried some infinity shots and it does not go there.(I do portraits 99.99% of the time, so I never reach infinity)

Now I have another question: After sanding off the lip "A", will "B" also need to be reduced? Nur says to ignore "B", but it looks like it might also be in the way. And also maybe the flange side that faces the lens?

Thanks!!
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Post Options Post Options   Quote cjc181166 Quote  Post ReplyReply Direct Link To This Post Posted: 23 January 2007 at 18:46
I filed the A part flush and [nur] sent me the orginal adapter he modified and he had done the same thing to his. Thanks [nur]:)
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