Medium format lenses converted on 35mm digitals.
/forum/topic/1132088/7

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Alf Beharie
Registered: Apr 18, 2007
Total Posts: 834
Country: United Kingdom

contas wrote:
We do know EF/-s protocols are the same from SA , so I decided to use the AF confirm chip for Canon on my SA mount.Before doing it, I did a large search on the internet , but the result was absolute negative, many guys confirmed that can't do such thing, due to of different mount throat radiuses between the two.
OK, I did it and get it now.Is that easy?.No, it is a big NO here.Before got the last success, I broke 3 chips, used 2 sets of epoxy glue and fortunately didn't get a single electric shortcut, that could kill SD1 Merrill in a fraction of a second.
How do I do it for my Leica Elmarit 135mm , a real solid lens, no room to hide a PCB.
Materials :
1- M42 to SA adaptor, get it on Ebay rather cheap.
2- AF confirm chip for Canon EOS , from Ebay also.
The Leica lens need to remove all fins.
A small cog is created at 4 h, immitated the rear of the SA mount to switch AF.
Measure carefully each camera's pin locations , then mark them on the inner SA mount throat.
Glue the chip accordingly the marks, for stronger, I created the base for the chip.
Wait 2 hours, then soldering a drop of lead on the 2rd chip pin, a little higher the rest 5 chip pins, then file it down to creat the plane as other 5.
Note: never let the 1st left camera pin touch anything, that's is very important like live or die matter .
It depends on the skills, if I don't have those, I do it many times untill get it.




Blimey, I applaud your efforts...rather you than me!



contas
Registered: Jul 21, 2010
Total Posts: 1047
Country: Vietnam

Thanks Alf Beharie, if I can do so do you.Here is it look like.



contas
Registered: Jul 21, 2010
Total Posts: 1047
Country: Vietnam

Mir 45mm ,@8.0 on SD1 Merrill Iso 100 1/200s.This lens grasps tiny patterns of water wave and cloud, never let me disappointed.



contas
Registered: Jul 21, 2010
Total Posts: 1047
Country: Vietnam

River boat-house and fish-farm/ sea-shore city in background.
Mir 45mm, @f/8.0 on Sigma SD1 Merrill Iso 100 1/640s.



igmolinav
Registered: Sep 20, 2010
Total Posts: 425
Country: United States

Hi,

Thank you for this nice and interesting thread : ) !!!

Kind regards,

igmolinav : ) !!!



contas
Registered: Jul 21, 2010
Total Posts: 1047
Country: Vietnam

Thanks Igmolinav, life is real nice itself, we are all blessed to live and see it.



contas
Registered: Jul 21, 2010
Total Posts: 1047
Country: Vietnam

Apo-Makro-Planar, @4.0 on Sigma SD1 Merrill Iso 100 1/2000s.
Nice wild flower found on the road, I drove by and saw it, stoped the car, drove back then shot it.



contas
Registered: Jul 21, 2010
Total Posts: 1047
Country: Vietnam

Another wild , the same combo at 1/320s.



contas
Registered: Jul 21, 2010
Total Posts: 1047
Country: Vietnam

A crouching dragon.
The same combo at 1/320s .



e6filmuser
Registered: Oct 11, 2008
Total Posts: 2030
Country: United Kingdom

Nice yellow flower. My personal preference would be to have used f8 or f11 to show lots of petal texture.

Harold



contas
Registered: Jul 21, 2010
Total Posts: 1047
Country: Vietnam

Thanks Harold, there is an untold rule for flower, lady and pet that I use the lens as much bokeh as possible .So only the good lenses can depict the details in the thin DOF.Using deep DOF by f/8.0 or higher the whole scene appears whithin the frame, causing a distraction from the main topic.IMHO.



R.Young
Registered: Jul 01, 2011
Total Posts: 917
Country: United Kingdom

I finally got to shoot with my Hasselblad-EF tilt adapter. 80mm f/2.8 Planar on 5D2:


Hackney Farm by Rob.Young, on Flickr


e6filmuser
Registered: Oct 11, 2008
Total Posts: 2030
Country: United Kingdom

contas wrote:
Thanks Harold, there is an untold rule for flower, lady and pet that I use the lens as much bokeh as possible .So only the good lenses can depict the details in the thin DOF.Using deep DOF by f/8.0 or higher the whole scene appears whithin the frame, causing a distraction from the main topic.IMHO.


Fair enough. I have never bothered much with bokeh, although I can think of subject material for which I might.

Harold



contas
Registered: Jul 21, 2010
Total Posts: 1047
Country: Vietnam

As I received some questions about Iris controling of Apo-Makro-Planar on Sigma SD1 Merrill, I did a VC on how it works.
http://www.youtube.com/watch?v=Mb4QE-n-pLM&feature=youtu.be



kkibrisli
Registered: Mar 25, 2012
Total Posts: 30
Country: Canada

Hi contas, I liked your pictures so much that I am considering to get s SD1 Merrill myself. YGM.



contas
Registered: Jul 21, 2010
Total Posts: 1047
Country: Vietnam

Thanks thminhduc and kkibrisli.
Before you buy a Sigma SD1 you must plan which type of photography, then the suitable lens.The SD1 owns an excellent sensor, it out resolves Sigma and Canon lenses, some others like Zeiss, Leica, CZJ and Russian Zeiss copies could match totally or partially.The best mustbe MF( medium format)Zeiss.Doing a conversion isn't an easy task as you might see.
I am doing it, so I know how risk it is and am doing it not alone, around me there are lathe mechaniks, electroniks, lens part retailers, who knows their jobs brilliantly, that I can count on, but they don't know my job in the whole - that's a big secret.So be considered before you take a serious jump.I could share some of mine for courageous people who can take their own risk as a reward.



RustyBug
Registered: Feb 02, 2009
Total Posts: 12585
Country: United States

Of course, you can still use the excellent optics via adapter (much simpler than conversion). You'll typically have to use them in stopped down mode (guessing same for Merrill) and won't have shutter priority or program mode. Manual and Aperture mode typically work fine.

Then if you REALLY REALLY want to go for a conversion as contas has ... go for it. Me, I'm too chicken to try such a conversion, but I still use MF glass on DSLR with regularity.



Mescalamba
Registered: Jul 06, 2011
Total Posts: 2978
Country: Czech Republic

Im pretty sure some regular C/Y lens can feed SD1M too. Or Leica R. But either way, its going to be quite expensive, cause that sensor is incredibly demanding.

But, for example 35/1.4 Sigma was make for SD1M and now there will be 18-35/1.8 which again is made for SD1M.

Must say that resolution from SD1M photos always make me want to have one. Considering I shoot mostly flowers, I might get one.. one day.



contas
Registered: Jul 21, 2010
Total Posts: 1047
Country: Vietnam

For SD1 there no easy meal like for Canon, Nikon, Nex.A closest adaptor is Kipon-EOS with mechanical iris:
http://www.ebay.com/itm/Kipon-Contax-645-mount-lens-to-Canon-EOS-EF-Adapter-for-5D-II-III-7D-60D-600D-/350568187636?pt=US_Lens_Adapters_Mounts_Tubes&hash=item519f7e06f4
You can replace EF mount by M42-SA mount:
http://www.ebay.com/itm/M42-Mount-Lens-to-Sigma-SA-SD-Mount-Adapter-For-SD7-SD9-SD10-SD14-SD15-/271191801451?pt=US_Lens_Adapters_Mounts_Tubes&hash=item3f244a7e6b
Usually m42-SA mount is less 0.5mm than EF mount so you need to add a shim.Further more if you want to have a AF confirm you can follow my instructions on the top of this page.



inglis
Registered: Feb 24, 2011
Total Posts: 328
Country: United States

This is all so interesting about the possibilities and difficulties with the SD1M
and also all the MF stuff. Thanks all!

By the way, can anyone recommend sharpening ballpark settings for lightroom to begin with?
I see that many have discussed photoshop settings on various threads.
Am starting to experiment and find that the settings I normally use don't seem sharp enough.
Took the plunge with a Mamiya 120 macro and feel like I am sinking into a foreign sea.

Any other suggestions for simple minded beginners?



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