FAQ FAQ  Forum Search   Events   Register Register  Login Login

E-Mount (NEX) adapters

Page  <1 34567 16>
Author
ryansholl View Drop Down
Senior Member
Senior Member

Joined: 10 February 2010
Location: United States
Status: Offline
Posts: 787
Post Options Post Options   Quote ryansholl Quote  Post ReplyReply Direct Link To This Post Posted: 26 March 2013 at 19:44
I have done exactly that in creating an adapter with a filter mount inside. Built mine to take 1.25" astronomical filters.

With the lens that I have (Samyang 14) it will not allow focus at infinity (on my nex7 with hot filter intact). Are you planning on not removing the shims under the sensor when you remove the IR filter to take care of the rear element to sensor distance issue? Take note that this may not allow infinity focus without a filter in place.
 



Back to Top
Alex H View Drop Down
Senior Member
Senior Member
Knowledgebase Contributor

Joined: 06 November 2008
Country: Sweden
Location: Stockholm
Status: Offline
Posts: 1591
Post Options Post Options   Quote Alex H Quote  Post ReplyReply Direct Link To This Post Posted: 26 March 2013 at 19:46
Originally posted by ryansholl ryansholl wrote:

I have done exactly that in creating an adapter with a filter mount inside. Built mine to take 1.25" astronomical filters.

With the lens that I have (Samyang 14) it will not allow focus at infinity (on my nex7 with hot filter intact). Are you planning on not removing the shims under the sensor when you remove the IR filter to take care of the rear element to sensor distance issue? Take note that this may not allow infinity focus without a filter in place.


Putting thick IR filter inside the adapter in my experience compensates enough for the absence of ICF in the NEX.
Back to Top
ryansholl View Drop Down
Senior Member
Senior Member

Joined: 10 February 2010
Location: United States
Status: Offline
Posts: 787
Post Options Post Options   Quote ryansholl Quote  Post ReplyReply Direct Link To This Post Posted: 26 March 2013 at 19:58
Thanks for that note Alex. With or without the sensor shims?

Back to Top
Alex H View Drop Down
Senior Member
Senior Member
Knowledgebase Contributor

Joined: 06 November 2008
Country: Sweden
Location: Stockholm
Status: Offline
Posts: 1591
Post Options Post Options   Quote Alex H Quote  Post ReplyReply Direct Link To This Post Posted: 27 March 2013 at 10:39
I seem to have missed Your comment, Ryan.

If I remember correctly, NEX-5N sensor does not have any shims.At least I can not find any shims on my pictures NEX-5N disassembly. Unlike in DSLR, having main sensor autofocus negates the need to calibrate exact sensor position. All You need is to have lenses that will focus past infinity. For example, Sony NEX mount 16mm lens will focus to infinity even on the camera without ICF.
Back to Top
cvicisso View Drop Down
Groupie
Groupie

Joined: 02 June 2012
Country: United States
Location: United States
Status: Offline
Posts: 56
Post Options Post Options   Quote cvicisso Quote  Post ReplyReply Direct Link To This Post Posted: 27 March 2013 at 10:57
Originally posted by ryansholl ryansholl wrote:

I have done exactly that in creating an adapter with a filter mount inside. Built mine to take 1.25" astronomical filters.

With the lens that I have (Samyang 14) it will not allow focus at infinity (on my nex7 with hot filter intact). Are you planning on not removing the shims under the sensor when you remove the IR filter to take care of the rear element to sensor distance issue? Take note that this may not allow infinity focus without a filter in place.

Ryan - thanks. When I started on this quest, I originally had the same question, as other IR-photography related sites mentioned that the filter must be replaced with a piece of [appropriate] clear glass in order to account for new sensor-to-rear-element distance. Alex H and others seem to have pulled it off without this [difficult] step and it still seems to work. Which gave me hope! But I understand where you're coming from...

It seems (from your post) that a change in the diffraction properties of the medium (ie. light traveling through glass/filter instead of air) will affect the focal distance between the rear element of the lens and the sensor. This makes perfect sense. I assume you've already tried this, but does your Samyang lens allow [manually] focusing BEYOND (past) infinity? I'm wondering if this might allow for the correct readjustment of the focal distance change made by insertion of the filter element.    
NEX-6 | NEX-3 | E PZ 16-50 | 16/2.8 | VCL-ECU1 | VCL-ECF1 | LA-EA2 | | Maxxum 7 | 50/1.7 | 70-210/4 Beercan |
Back to Top
cvicisso View Drop Down
Groupie
Groupie

Joined: 02 June 2012
Country: United States
Location: United States
Status: Offline
Posts: 56
Post Options Post Options   Quote cvicisso Quote  Post ReplyReply Direct Link To This Post Posted: 27 March 2013 at 11:11
Originally posted by Alex H Alex H wrote:

All You need is to have lenses that will focus past infinity. For example, Sony NEX mount 16mm lens will focus to infinity even on the camera without ICF.

It looks like you hit send while I was still typing!
NEX-6 | NEX-3 | E PZ 16-50 | 16/2.8 | VCL-ECU1 | VCL-ECF1 | LA-EA2 | | Maxxum 7 | 50/1.7 | 70-210/4 Beercan |
 



Back to Top
Bob J View Drop Down
Admin Group
Admin Group
Dyxum Administrator

Joined: 23 December 2005
Country: United Kingdom
Location: London
Status: Offline
Posts: 26534
Post Options Post Options   Quote Bob J Quote  Post ReplyReply Direct Link To This Post Posted: 31 March 2013 at 21:59
Does anyone have any recommendation for a Contax G to NEX adapter?
Back to Top
Alain View Drop Down
Senior Member
Senior Member

Joined: 14 October 2005
Location: Belgium
Status: Offline
Posts: 364
Post Options Post Options   Quote Alain Quote  Post ReplyReply Direct Link To This Post Posted: 13 April 2013 at 18:45
Originally posted by MichaelMeyer MichaelMeyer wrote:

I'm not sure if anyone has seen this yet, but Kipon has begun selling a pro tilt/shift adapter for NEX. The adapter is essentially a scaled down copy of the Mirex adapter. I bought a copy via *bay. The purchase was fairly painless, though I had to send the first adapter I received back because it did not fit properly.

I put a small first look up on my blog. Once I've done some more work with it I'll do a follow up.

Thought some here might find this interesting.


Am I correct that it's price is approx. $360?
Back to Top
MichaelMeyer View Drop Down
Groupie
Groupie

Joined: 27 May 2011
Location: Brooklyn, NY
Status: Offline
Posts: 78
Post Options Post Options   Quote MichaelMeyer Quote  Post ReplyReply Direct Link To This Post Posted: 13 April 2013 at 18:49
Yes, the cost was roughly $360. I don't remember off the top of my head if that included shipping or not.
Back to Top
Alain View Drop Down
Senior Member
Senior Member

Joined: 14 October 2005
Location: Belgium
Status: Offline
Posts: 364
Post Options Post Options   Quote Alain Quote  Post ReplyReply Direct Link To This Post Posted: 13 April 2013 at 19:06
Originally posted by MichaelMeyer MichaelMeyer wrote:

Yes, the cost was roughly $360. I don't remember off the top of my head if that included shipping or not.

Thanks
Back to Top
pegelli View Drop Down
Admin Group
Admin Group
Dyxum Administrator

Joined: 02 June 2007
Country: Belgium
Location: Schilde
Status: Offline
Posts: 31730
Post Options Post Options   Quote pegelli Quote  Post ReplyReply Direct Link To This Post Posted: 13 April 2013 at 20:35
Originally posted by Bob J Bob J wrote:

Does anyone have any recommendation for a Contax G to NEX adapter?
I don't have any recommendations since I don't use one.

But I stumbled on this thread in GetDPI who even talks about an AF capable adapter. Reading through it should be available now.
You can see the April Foolishness 2021 exhibition here Another great show of the talent we have on Dyxum
Back to Top
oldman View Drop Down
Groupie
Groupie

Joined: 06 June 2012
Country: United States
Location: Bellingham, WA
Status: Offline
Posts: 42
Post Options Post Options   Quote oldman Quote  Post ReplyReply Direct Link To This Post Posted: 25 April 2013 at 06:47
Originally posted by Bob J Bob J wrote:

Does anyone have any recommendation for a Contax G to NEX adapter?


I have four adapters.

One is a generic ebay noname adapter and the other three are all Fotodiox adapters. These have a little better build quality but all of them are less than "silky" and have rough spots. I find myself getting near critical focus and twisting the focus ring back and forth a half inch to loosen it up at the critical point. This probably sounds worse than it is but when you are used to smooth silky well dampened motion this is more like grinding meat. It is worth it for the lenses.
Sony A7s A7r Mod
Zeiss, Leica, Canon, Voigtlander lenses
Back to Top
MiPr View Drop Down
Admin Group
Admin Group
Mikre Dyxum Administrator

Joined: 25 August 2006
Country: Poland
Location: Wroclaw
Status: Offline
Posts: 21616
Post Options Post Options   Quote MiPr Quote  Post ReplyReply Direct Link To This Post Posted: 23 May 2013 at 21:38
OK, quick info about adapters I have:

1) M42 adapter - noname brand (some Chinese production),
2) M39 one - same as above,
3) Minolta AF (fourth photo on the main post) - borrowed from Bob (thanks!) just to see how it works and whether I would be comfy with it.

So, let me start with the #3 - it's solid, it's smart, it works perfectly. The aperture "ring" works very well - it's pleasure to use, although without any f-stops marked so the aperture is a guess. I think that this solution is better to "step down when taking a shot" approach.

The aperture lever, opposite to how it is done on the camera body and on the lens, is not "flat" but just a small rod. This makes problems when trying to use some non-alpha stuff on this adapter, e.g. Alpha-M42 adapter does not work. I think this could be worked around by using a file on it (I mean - not on your adapter Bob ).

The other disadvantage is that it is not chipped. Not a huge problem but you will not know what lens was in use. Oh well, nothing is perfect.


As for the #1 and #2 - both adapters are very similar: black-coloured aluminum with an "inset" where you screw-in your lens. This inset is mounted to the adapter using three screws and after getting them a bit loose you can turn the inset around. This allows you to position the lens correctly (usually not a problem unless you want to use e.g. Zenitar 16/2.8 which has integrated lens hood).

Everything is solid, mounts easily and generally I'm quite happy with them. Or better to say - I was happy because after today's walk I found a big surprise: namely the M42 adapter is way too short

Previously I have not noticed it because I was shooting close-up scenes with macro ext rings. But for today's walk I took Mir 1W (37/2.8) and I immediately noticed that the lens focuses at infinity when the scale shows ... 1.7m! So it was clear that the adapter is too short. At least good that this is this way and not opposite.

After returning home I took my caliper and performed some measurements. The flange for E-mount is 18mm so we have following:

           Alpha   M42   M39
Flange     44.5   45.46 28.8
Adapter    26.5   27.46 10.8
Measured   26.3   26.70 10.6
Difference 0.2    0.76   0.2


As you can see all three adapters are too short comparing to what they should be. In case of Bob's adapter and M39 it is not disastrous - only 0.2mm - but still there should be no difference. In case of my M42 the difference is quite pronounced and quite noticeable when focusing (remember - infinity at 1.7m!). Hopefully the construction of the M42 and M39 adapters allow to fix the issue quite easily by removing the inset and putting some separator under it.

Still, I believe that this is not a rocket science to produce a piece of metal pipe with the tolerance of 0.1mm so I'm astonished with such inaccuracy Please note: the M42 adapter for my A700 is done as it should be ...

p.s.
No, my caliper was not Chinese
I'm noise-blind. And noise-about-noise-deaf too ... |   BTW, Dyxum Weekly Exhibitions don't grow on trees ...
Back to Top
MiPr View Drop Down
Admin Group
Admin Group
Mikre Dyxum Administrator

Joined: 25 August 2006
Country: Poland
Location: Wroclaw
Status: Offline
Posts: 21616
Post Options Post Options   Quote MiPr Quote  Post ReplyReply Direct Link To This Post Posted: 23 May 2013 at 21:45
Ahh, I've forgotten to add one observation about using Minolta AF lenses: manual focusing is really cumbersome on some of them. I mean: the focus ring is not smooth - if you need to move it a tiny bit it becomes "jumpy", i.e. you have to apply some more force to move it and it jumps further than intended. This especially concerns second-gen Minolta lenses, e.g. 70-210/3.5-4.5 or 75-300/4.5-5.6. Comparing those lenses to their first-gen counterparts, e.g. beercan and big beercan there is a huge difference: first-gens are smooth and nice to operate ...
I'm noise-blind. And noise-about-noise-deaf too ... |   BTW, Dyxum Weekly Exhibitions don't grow on trees ...
Back to Top
Dyxum main page >  Forum Home > Equipment forums > Lens Talk > Adapters and converters Page  <1 34567 16>

Forum Jump Forum Permissions View Drop Down



This page was generated in 0.078 seconds.

Monitor calibration strip

Dyxum.com - Home of the alpha system photographer

In memory of Cameron Hill - brettania

Feel free to contact us if needed.