hirohhhh Posted March 9 Share #1 Posted March 9 Advertisement (gone after registration) Has anyone tried this combination? I have a newer MP, and I find the 40mm quite interesting. This lens is also very compact, which I like, so I’d like to purchase one if it’s convenient to use on M bodies. I read that focusing under 1m may not be accurate, and of course, there are no 40mm framelines. Is there anything else I should know that would help me make a purchase decision? Link to post Share on other sites More sharing options...
Advertisement Posted March 9 Posted March 9 Hi hirohhhh, Take a look here Summicron-C 40mm on M Body. I'm sure you'll find what you were looking for!
a.noctilux Posted March 9 Share #2 Posted March 9 If you use filter, it's rare size, 5.5 Serie. E39 filter has 0.5mm thread size, still be used only screw-in fewer than one turn ( 0.75mm thread size on 40mm), so beware. Better use M-Rokkor 2/40mm lens with linear focus ramp, and E40.5 filter size, to be check maybe flare resistance with multicoating lenses Link to post Share on other sites More sharing options...
Derbyshire Man Posted March 9 Share #3 Posted March 9 (edited) I bought one for M11M/P/D and thought it was great for all of the reasons you mention. No issues with focus. It did have a very stiff focus however so I sent it off to be lubricated about 4 days after I bought it and very much looking forward to getting it back. Edited March 9 by Derbyshire Man Link to post Share on other sites More sharing options...
TomB_tx Posted March 10 Share #4 Posted March 10 I bought one (on a film CL) in the 1970s and have tried it on various M bodies. Focus has been fine on all of them. I really only use it on the film CL where it just feels right. However I also have the Elmar-C 90 (also for the film CL) that has a similar focus cam, and do use it on M bodies without issues. 1 Link to post Share on other sites More sharing options...
RobW0 Posted March 10 Share #5 Posted March 10 (edited) I just recently purchased a Leica 40mm Summicron-C, but unfortunately it has a problem with the focus (Off by about 5ft, the person that cleaned it last did not put it back together correctly). It is in great shape other than that so I am in the process of sending it to DAG to get it fixed. For the filter, Squarehood has and adapter ring that will let you use 39mm filters. I look forward to getting it back based on some test shot using LV. It is a great little lens. Edited March 10 by RobW0 Link to post Share on other sites More sharing options...
lct Posted March 10 Share #6 Posted March 10 (edited) Another vote for the M-Rokkor 40/2 for Minolta CLE. It has a similar size but is lighter than the Summicron-C 40/2 (105g vs 125g). It sports screw-in 40.5mm vs series 5.5 filters, has a level vs sloped focus cam, is multi coated vs single coated and has a bit less flare than the Summicron but otherwise their IQ is so close that it is difficult to tell which is which. They both bring up 50mm framelines but their flange can be filed out to bring up 35mm framelines instead. MFD is the same 0.9m, which can be an issue compared to modern 35mm lenses focusing closer. Edited March 10 by lct 4 Link to post Share on other sites More sharing options...
hirohhhh Posted March 12 Author Share #7 Posted March 12 Advertisement (gone after registration) Hmm, now I’m not sure. All the reasons for choosing the Rokkor are valid, except that I already have a bunch of E39 filters. I know the thread size is different, but how well do they actually fit in practice? Link to post Share on other sites More sharing options...
RobW0 Posted March 12 Share #8 Posted March 12 50 minutes ago, hirohhhh said: Hmm, now I’m not sure. All the reasons for choosing the Rokkor are valid, except that I already have a bunch of E39 filters. I know the thread size is different, but how well do they actually fit in practice? Squarehood makes this adapter that allows the use of e39 filters on the leica 40mm summicron-c. https://www.popflash.com/accessories/squarehood-black-adapter-ring-new-for-leica-40mm-summicron-c-lens/ Link to post Share on other sites More sharing options...
hirohhhh Posted March 12 Author Share #9 Posted March 12 (edited) Ah, okay, good to know, although I’m not a fan of adapters. I think I’ll start with the Summicron-C and see how I like it. Thanks, everyone! Edited March 12 by hirohhhh Link to post Share on other sites More sharing options...
lct Posted March 12 Share #10 Posted March 12 E39 Leica filters can be used without adapter on the Summicron-C 40/2. The filter and the lens have not the same thread pitch though. Better abstaining from screwing the filter too tight then, otherwise you might damage the lens. But the rubber hood can be screwed into the filter this way, which can be handy if your filters have an internal thread. 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! 1 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/419760-summicron-c-40mm-on-m-body/?do=findComment&comment=5771108'>More sharing options...
swatch Posted March 13 Share #11 Posted March 13 does cron 40mm render same as cron 35mm version 4 ( pre-asph )? Link to post Share on other sites More sharing options...
lct Posted March 13 Share #12 Posted March 13 1 hour ago, swatch said: does cron 40mm render same as cron 35mm version 4 ( pre-asph )? Difficult to compare 6 vs 7 elements. I would rather compare the Summicron 35/2 v3 but i have no experience with it sorry. Link to post Share on other sites More sharing options...
wdshuck Posted March 13 Share #13 Posted March 13 On 3/9/2025 at 9:50 PM, lct said: Another vote for the M-Rokkor 40/2 for Minolta CLE. It has a similar size but is lighter than the Summicron-C 40/2 (105g vs 125g). It sports screw-in 40.5mm vs series 5.5 filters, has a level vs sloped focus cam, is multi coated vs single coated and has a bit less flare than the Summicron but otherwise their IQ is so close that it is difficult to tell which is which. They both bring up 50mm framelines but their flange can be filed out to bring up 35mm framelines instead. MFD is the same 0.9m, which can be an issue compared to modern 35mm lenses focusing closer. I just picked up an M-Rokkor 40mm and am happy so far. The lens has a good quality metal build and makes my M feel tiny. I believe the MFD is 0.8m, at least based on the markings on my lens. Can report further after I have a few days to play with it. 1 1 Link to post Share on other sites More sharing options...
lct Posted March 13 Share #14 Posted March 13 On 3/10/2025 at 2:50 AM, lct said: [...] MFD is the same 0.9m [...]. I meant 0.8m, sorry for the typo. Link to post Share on other sites More sharing options...
raizans Posted March 13 Share #15 Posted March 13 I would definitely go with the 40mm Summicron with Squarehood adapter + hood combo, or with the M-Rokkor if you already have a set of 40.5mm filters. Link to post Share on other sites More sharing options...
J S H Posted March 15 Share #16 Posted March 15 On 3/12/2025 at 9:48 PM, raizans said: I would definitely go with the 40mm Summicron with Squarehood adapter + hood combo, or with the M-Rokkor if you already have a set of 40.5mm filters. I'll second this. The hood and adapter work great. Link to post Share on other sites More sharing options...
Frase Posted March 16 Share #17 Posted March 16 I had the summicron 40mm a few years ago as some have already said you dont really need the adapter filter will screw in enough without, I altered the mount so it would bring up the 35mm frame and changed the focus lever to the 35mm summicron version. Link to post Share on other sites More sharing options...
wdshuck Posted March 20 Share #18 Posted March 20 On 3/12/2025 at 10:37 PM, wdshuck said: I just picked up an M-Rokkor 40mm and am happy so far. The lens has a good quality metal build and makes my M feel tiny. I believe the MFD is 0.8m, at least based on the markings on my lens. Can report further after I have a few days to play with it. I’ve been enjoying my M-Rokkor 40mm for the past week or so. I wanted something to replace my VM 40 2.8, which was tiny and sharp, but felt a bit awkward in use and the images felt a bit sterile. I’m really enjoying the size - it’s very small, but still enough room to focus and operate the aperture ring easily. In use, the size feels similar to the VM 40 - the camera feels very light compared to my normal 50mm Summilux ASPH. Rendering is also a plus for me - the M-Rokkor 40mm reminds me of the 50mm Summicron v5 (or v4), however flare resistance seems a bit better and it feels perhaps a bit less sharp but not noticeably. The lens is definitely a keeper and look forward to using it when out and about with the family. Here are a few images near home: https://photos.app.goo.gl/FZhgX1buGG3faeFi8 1 1 Link to post Share on other sites More sharing options...
Alberti Posted March 27 Share #19 Posted March 27 (edited) On 3/13/2025 at 1:28 AM, swatch said: does cron 40mm render same as cron 35mm version 4 ( pre-asph )? Yes Absolutely. But just a tiny bit less so - in staging. The details of the KOB however are more enchanting (even) than the M-Rokkor. Of course there is a difference. Edited March 27 by Alberti Link to post Share on other sites More sharing options...
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