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Techart Leica M to Sony E AF adapter in development (new)
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PostPosted: Sun Jan 10, 2016 4:11 am    Post subject: Techart Leica M to Sony E AF adapter in development (new) Reply with quote

The discussion in Chinese forum Xitek
http://forum.xitek.com/thread-1535183-1-1-2.html

Video: http://v.youku.com/v_show/id_XMTQzNzUwMDQ2NA==.html

Here is the list of the approximate focus range of the adapter without using the focus ring of the lens.
15mm 6.5cm-inf
21mm 12cm-inf
24mm 15cm-inf
28mm 20cm-inf
35mm 31cm-inf
50mm 60cm-inf
90mm 1.8m-inf
135mm 4.2m-inf

P.S. For discussions on how xxx lens works on xxx E-mount camera, please use the old thread http://forum.mflenses.com/techart-leica-m-to-sony-e-af-adapter-in-development-t73847.html or open another thread in the appropriate section on this forum.


Last edited by calvin83 on Sun Jan 10, 2016 9:54 am; edited 1 time in total


PostPosted: Sun Jan 10, 2016 4:44 am    Post subject: Reply with quote

Some updates:

The open beta will starts very soon. (I think we will know more about how the adapters perform on different lenses within this month.)

The developer kpliang said he receive many suggestion on making a EOS mount version. So, it is possible we will see one later.

About the camera APP:

We can customize the operation of the adapter for each lens data saved in the adapter. If we don't need the AF function on certain lens, we can disable it on the APP.

There is opinion to choose where the adapter moves after taking a photo. It can be 1)stops after taking a photo, 2)moves to the infinity position and 3)move to the middle (between infinity(fully retracted) and the MFD position)

Here is the screen shot of the APP in development:
http://forum.xitek.com/forum-redirect-goto-findpost-ptid-1535183-pid-64595308.html


PostPosted: Sun Jan 10, 2016 4:47 am    Post subject: Reply with quote

There is another news. It seems there is someone who are working on the cooperation of the developer of Mitakon liuwzen and kpliang . We may see there will be AF E mount lenses made by Mitakon in the future. Wink


PostPosted: Mon Jan 11, 2016 12:43 pm    Post subject: Reply with quote

I heard a news that a well-known adapter is working on E mount electrical adapters for Rolleiflex 6008, probably it will support AF on E mount camera too. Wink


PostPosted: Mon Jan 18, 2016 5:56 pm    Post subject: Reply with quote

Extended tests here:
https://translate.google.com/translate?hl=en&sl=zh-CN&tl=en&u=http%3A%2F%2Fadvancegearbymx.com%2Fwordpress%2F%3Fp%3D842
and here:
http://www.sonyalpharumors.com/

It looks like the adapter will ship in late January for $349.
It's a bit expensive (compared with LA-EA 4), but not excessive.


PostPosted: Tue Jan 19, 2016 4:06 am    Post subject: Reply with quote

In the original post, the developer said the adapter will shipped from March and he never mentioned about the price. It is only cost $349, it is not a bad price consider it is the first one on the market.

Here is the link of a video testing the AF speed on A7II.
http://v.youku.com/v_show/id_XMTQ0OTA5MTQzNg==.html


PostPosted: Sun Jan 24, 2016 7:39 am    Post subject: Reply with quote

The testers has been received the adapter. The results are pretty promising for small lenses within 50mm(decently fast and very good accurately).


PostPosted: Sat Feb 06, 2016 4:23 pm    Post subject: Reply with quote

At this stage, the wide angles(21mm or below) does not works well on the adapter(also happen on the Contax G adapter with G21). Any lens slower than F5.6 may not work too due to the limit of the phase detection system.


PostPosted: Wed Feb 10, 2016 4:05 pm    Post subject: Reply with quote

Full specs of the adapter:
http://techartpro.com/product/techart-pro-leica-m-sony-e-autofocus-adapter/
and a new video presentation:
https://www.youtube.com/watch?v=3binM22uUpg


PostPosted: Wed Feb 10, 2016 5:49 pm    Post subject: Reply with quote

Good to see the price is finalized. There will be Leica R and Contax/Yashica mount version later. The EOS mount version will follow after the LR/CY version.

To Mods, please help to move this thread to the adapter section. Thank you!


PostPosted: Sat Mar 05, 2016 9:22 am    Post subject: Reply with quote

There are tests on the focus speed with different lenses at youtube now.
https://www.youtube.com/user/mxcamerahk/videos


PostPosted: Sat Mar 05, 2016 9:28 am    Post subject: Reply with quote

I have bought one in advance Wink

It shouldn`t be too long before they ship now


PostPosted: Sat Mar 05, 2016 9:30 am    Post subject: Reply with quote

Someone mention that focus peaking is clearer with the Kolarimod (removal of AA filter on A7), could this also have an effect on Techart AF adapter?


PostPosted: Sat Mar 05, 2016 9:46 am    Post subject: Reply with quote

Nordentro wrote:
Someone mention that focus peaking is clearer with the Kolarimod (removal of AA filter on A7), could this also have an effect on Techart AF adapter?

I think it may have slight impact on the focus speed. Anyway, it will works fine with or without the mod.


PostPosted: Sat Mar 05, 2016 11:21 am    Post subject: Reply with quote

calvin83 wrote:
... Any lens slower than F5.6 may not work too due to the limit of the phase detection system.


This is an interesting point, that can leading to the view that even a f 1.2 lens will not "AF" if it was set to f8 during operation.


PostPosted: Sat Mar 05, 2016 1:34 pm    Post subject: Reply with quote

listera wrote:
calvin83 wrote:
... Any lens slower than F5.6 may not work too due to the limit of the phase detection system.


This is an interesting point, that can leading to the view that even a f 1.2 lens will not "AF" if it was set to f8 during operation.

Yes. If F8 or slower is needed, set the aperture to F2.8 or F4 and focus before further stopping down the lens.


PostPosted: Thu Mar 24, 2016 12:58 pm    Post subject: Reply with quote

Nordentro wrote:
I have bought one in advance Wink

It shouldn`t be too long before they ship now


Have you received it, Lars?
I'm very curious to read your first-hand impressions, especially about the AF speed and about how well it handles heavier lenses.


PostPosted: Sun Apr 24, 2016 1:08 am    Post subject: Reply with quote

listera wrote:
calvin83 wrote:
... Any lens slower than F5.6 may not work too due to the limit of the phase detection system.


This is an interesting point, that can leading to the view that even a f 1.2 lens will not "AF" if it was set to f8 during operation.


From my experience with my DIY AF adapter my conclusion is that it is not the low light level that first limits the AF accuracy with some lenses set to f/8 or more but mainly the large DOF makes it difficult to find the best focus. With the diaphragm opened they often can AF very well in low light but with it closed the camera often has problems to AF even in strong light.

Therefore the max. f-stop usable for AF depends, IMO, on the FL of the lens.


PostPosted: Sun Apr 24, 2016 4:03 am    Post subject: Reply with quote

Some people has already get the adapters and it seems it works pretty decent. There are two limitations which worth mentioning:

1. The focus point on the edge on some camera does not works very well compare to the focus point on the center region (e.g. A7RII)

2. The uniform of thickness is not as good as the MF focus helicoid. It should not be a problem with normal or tele lens but will affect those ultra wides.


PostPosted: Mon Apr 25, 2016 3:58 am    Post subject: Reply with quote

dan_ wrote:
Nordentro wrote:
I have bought one in advance Wink

It shouldn`t be too long before they ship now


Have you received it, Lars?
I'm very curious to read your first-hand impressions, especially about the AF speed and about how well it handles heavier lenses.


Still waiting for mine Dan. I will share my thoughts as soon as I get it Wink


PostPosted: Mon Apr 25, 2016 3:53 pm    Post subject: Reply with quote

Quite impressive! Fact it does not perform very well under bad light conditinns does not bother me as it is usually better to go manual then. The nice thing, if there is a solution to use my Minolta MD lenses, is that you can use it when manual is going to cause you problems (such a wife's impatience,...) or when you are not too bothered with spending time doing reallya nice picture (some kind of event).
Will be looking forward to a model that would work


PostPosted: Thu May 26, 2016 3:43 pm    Post subject: Reply with quote

I received my adapter on Monday and have been doing some limited testing on my A7II. The focusing is accurate and pretty quick on moderate and abundant light, but it’s pretty slow (and sometimes non-working) on low light. The AF works on single-shot or continuous AF modes and smile/face detect also works. Even though some users have reported lockups, it hasn’t locked up on me yet. The focusing distance is 4.5mm so it will obviously work best with shorter focal lengths.

One thing to note is that some of the cheap LM adapters will NOT work with the techartpro without modification. (because of the front motor cover) I had to remove material from the Konica AR-LM adapter for it to fit and also had to modify the MAF-LM adapter. The Nikon F-LM adapter works fine without modification.


PostPosted: Thu May 26, 2016 4:44 pm    Post subject: Reply with quote

Good to see the adapter work fine. Congrats

BTW, Yeenon made a set of adapter for this Techart adapter. They also work on Leica cameras with life-view too with support of 6-bit code.
stores.ebay.com.hk/yeenon-china/Leica-M-adapter-/_i.html?_fsub=12619805013


Last edited by calvin83 on Thu May 26, 2016 5:24 pm; edited 1 time in total


PostPosted: Thu May 26, 2016 4:54 pm    Post subject: Reply with quote

calvin83 wrote:
BTW, Yeenon made a set of adapter for this Techart adapter. They also work on Leica cameras with life-view too with support of 6-bit code.
[url]stores.ebay.com.hk/yeenon-china/Leica-M-adapter-/_i.html?_fsub=12619805013[/url]


Thanks for the info! I need to order an M42-lm.


PostPosted: Mon May 30, 2016 2:58 pm    Post subject: Reply with quote

In their projects, have they included some adapters where they could have more than the 4.5 mm they are limited to with Leica? Because if they could get up to a centimeter or more, that would be great even for small teles. Will probably wait until then to buy an A7 series x depending on the wait. Understand Minolta MD will not be top priority though...