robgo2 Posted August 25, 2017 Share #1 Â Posted August 25, 2017 Advertisement (gone after registration) And if so, how is it done? Â Rob Link to post Share on other sites More sharing options...
Advertisement Posted August 25, 2017 Posted August 25, 2017 Hi robgo2, Take a look here Anyone using a Contax G 21 on an SL?. I'm sure you'll find what you were looking for!
steppenw0lf Posted August 26, 2017 Share #2  Posted August 26, 2017 (edited) Contax G cannot be attached to an SL. You can only use "ordinary" Contax. The 2.8/21mm Distagon is a great lens. It is one of my favorites. But it is quite big. The modern Zeiss Milvus 21mm is almost identical.  The G 21 is a Biogon, smaller but optically inferior (in my opinion). But tastes are different. So if you insist on it, you will have to find somebody to rebuild it for you (a reconstruction, destroying the original). From time to time you will find offers to change it for M mount. But in my eyes not to be recommended.  https://www.l-camera-forum.com/topic/192866-contax-g-objektive-für-m-bajonett/ Edited August 26, 2017 by steppenw0lf Link to post Share on other sites More sharing options...
wellfleet Posted August 26, 2017 Share #3 Â Posted August 26, 2017 (edited) I tried this quite awhile ago. I bought a m-mount helicoid conversion kit from Hawk Peng of Hawk's Factory and had DAG convert my G21. I shot with it for about a week and gave up. Color shift was a problem and, as I was an Aperture user, I didn't feel like dealing with Cornerfix to correct it. Lightroom or C1 would probably easily take care of that problem today. I had DAG reconvert it back to a G. The helicoid is now for sale at FM. Â You can read about this at the FM forum. There is a guy from CA who used to do a different m-mount conversion, without a DOF scale I believe. Â FM forum -Â http://www.fredmiranda.com/forum/topic/1353815/2 Edited August 26, 2017 by wellfleet Link to post Share on other sites More sharing options...
robgo2 Posted August 26, 2017 Author Share #4 Â Posted August 26, 2017 Well, it was just a thought. The 21 f2.8G was one of my favorite lenses on the Contax G2. The consensus today seems to be that the SEM 21 f/3.4 is the lens to get for Leica M and SL. Â Rob Link to post Share on other sites More sharing options...
wellfleet Posted August 26, 2017 Share #5  Posted August 26, 2017 (edited) Well, it was just a thought. The 21 f2.8G was one of my favorite lenses on the Contax G2. The consensus today seems to be that the SEM 21 f/3.4 is the lens to get for Leica M and SL.  Rob   That's what I bought. If you're going to convert G lenses I'd stick to the 45 and 90. The Biogons are problematical for digital sensors, unless you're only shooting B&W. Edited August 26, 2017 by wellfleet Link to post Share on other sites More sharing options...
frame-it Posted August 26, 2017 Share #6  Posted August 26, 2017 http://www.japanexposures.com/lens/   And if so, how is it done?  Rob  Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/276130-anyone-using-a-contax-g-21-on-an-sl/?do=findComment&comment=3345490'>More sharing options...
robgo2 Posted August 26, 2017 Author Share #7 Â Posted August 26, 2017 Advertisement (gone after registration) http://www.japanexposures.com/lens/ I was already aware of that option, but since I own a copy of the 21G, I was wondering if there might be a simple and inexpensive way of having it converted. Now I am more concerned about its performance on the SL sensor. Â Rob Link to post Share on other sites More sharing options...
ramarren Posted August 26, 2017 Share #8 Â Posted August 26, 2017 (edited) I had that lens too, and sold it when I sold the Contax G2. They're difficult to convert and the Leica M or R lenses work better on the SL anyway, both due to their designs and the fact that Leica provides lens profiles for them. Edited August 26, 2017 by ramarren Link to post Share on other sites More sharing options...
GLAUMAX Posted January 28, 2020 Share #9  Posted January 28, 2020 (edited) It seems that Kipon is now making a ring to mount G lenses on the SL. According to some tests, all the lenses are perfectly working except the 35-70. I think I should give it a try.  Edited January 28, 2020 by GLAUMAX Link to post Share on other sites More sharing options...
wellfleet Posted January 28, 2020 Share #10  Posted January 28, 2020 3 hours ago, GLAUMAX said: It seems that Kipon is now making a ring to mount G lenses on the SL. According to some tests, all the lenses are perfectly working except the 35-70. I think I should give it a try.  You might check this thread before you buy, as it seems you'll have a problem with the 21 and 28. https://www.l-camera-forum.com/topic/305139-contax-g-lens-adapter-success-and-failure/  Link to post Share on other sites More sharing options...
GLAUMAX Posted January 30, 2020 Share #11  Posted January 30, 2020 On 1/28/2020 at 5:05 PM, wellfleet said: You might check this thread before you buy, as it seems you'll have a problem with the 21 and 28. https://www.l-camera-forum.com/topic/305139-contax-g-lens-adapter-success-and-failure/  Thanks but it seems the problem occurs when using the 21mm on the CL. Not sure it is not working on the SL Link to post Share on other sites More sharing options...
wellfleet Posted January 30, 2020 Share #12  Posted January 30, 2020 Michali said that the 28mm didn't work on the SL which would mean that the 21mm probably wouldn't work either as its tabs are as long as the 28mm Are you planning on sawing them off which has been done to adapt them to other cameras? And the glass being deeper than the adapter might present a problem with it touching the sensor.  1 Link to post Share on other sites More sharing options...
michali Posted January 30, 2020 Share #13  Posted January 30, 2020 (edited) 2 hours ago, GLAUMAX said: Thanks but it seems the problem occurs when using the 21mm on the CL. Not sure it is not working on the SL  1 hour ago, wellfleet said: Michali said that the 28mm didn't work on the SL which would mean that the 21mm probably wouldn't work either as its tabs are as long as the 28mm Are you planning on sawing them off which has been done to adapt them to other cameras? And the glass being deeper than the adapter might present a problem with it touching the sensor.  Have a look at the image in this post. The tabs are only part of the problem, these can be removed.  The protruding rear element is possibly a bigger problem. I would not risk damaging the sensor, and even if this wasn't an issue, I'm quite sure that image quality would be compromised due to the distance from the rear element to the sensor.  Edited January 30, 2020 by michali 1 Link to post Share on other sites More sharing options...
wellfleet Posted January 30, 2020 Share #14  Posted January 30, 2020 (edited) 29 minutes ago, michali said: I'm quite sure that image quality would be compromised due to the distance from the rear element to the sensor.  I can confirm this as I had a G 21mm converted to Leica M mount, and there were problems with color cast and corner smearing as the ray angles are so extreme,. So I can't see how it would be any different with a Kipon adapter. I felt it was so bad that I converted  it back to a G mount. Edited January 30, 2020 by wellfleet 1 Link to post Share on other sites More sharing options...
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