jonnyboy Posted April 12, 2021 Share #1 Â Posted April 12, 2021 Advertisement (gone after registration) Hey! I recently saw some G-to-M converter and I was wondering if anyone in here is using Contax lenses on M bodies? Obviously it will have to be focused with Live View I'd be particular interested in using my Sonnar 90mm and 21mm. As much as I would love to get both lenses from Leica - at the moment I'm really not in for gears-shopping! Any advise would be appreciated! Link to post Share on other sites More sharing options...
Advertisement Posted April 12, 2021 Posted April 12, 2021 Hi jonnyboy, Take a look here Contax G Lenses on Digital M Bodies. I'm sure you'll find what you were looking for!
farnz Posted April 12, 2021 Share #2  Posted April 12, 2021 Make sure that the G to M convertors include a focussing ring or some other means of focussing because Contax G lenses were autofocus so there's no way to focus the lens manually. Pete. 1 Link to post Share on other sites More sharing options...
LarsHP Posted April 12, 2021 Share #3 Â Posted April 12, 2021 I know of Contax G to Leica M conversion kits, but so far, I haven't seen an adapter. Converting a lens from Contax G to Leica M mount means you will have to take the lens apart and modify the focusing mechanism in order to make it work on an M camera. I used to have the Contax G 90mm Sonnar and used it on digital mirrorless cameras, but that was with adapters that made use of the original focusing mechanism. 1 Link to post Share on other sites More sharing options...
jonnyboy Posted April 12, 2021 Author Share #4 Â Posted April 12, 2021 ahh right, yeah i thought those c/y adapters had some focus mechanism but now that I'm looking at it they dont! Gutted! Link to post Share on other sites More sharing options...
Anbaric Posted April 12, 2021 Share #5  Posted April 12, 2021 (edited) 2 hours ago, jonnyboy said: ahh right, yeah i thought those c/y adapters had some focus mechanism but now that I'm looking at it they dont! Gutted! If it's described as a C/Y adapter it's probably for the Contax/Yashica SLR mount, which is different to the G mount (and different again to the N mount used on the NX AF SLR). The C/Y SLR lenses have mechanical focusing rings. Still no rangefinder coupling, of course. Edited April 12, 2021 by Anbaric 3 Link to post Share on other sites More sharing options...
farnz Posted April 12, 2021 Share #6  Posted April 12, 2021 1 hour ago, jonnyboy said: ahh right, yeah i thought those c/y adapters had some focus mechanism but now that I'm looking at it they dont! Gutted! I recall that some time ago there was a vendor on eBay who was selling the focussing mount/conversion kits for the 90/2.8 Sonnar, or if you sent him your 90/2.8 Sonnar he would convert it for you for a quite reasonable charge, or he would sell you a converted 90/2.8 Sonnar - whichever you preferred. I don't recall him offering other Contax G focal lengths at the time but he might have branched out by now. Pete. 1 Link to post Share on other sites More sharing options...
Guest JMF Posted April 13, 2021 Share #7  Posted April 13, 2021 (edited) Advertisement (gone after registration) 45 minutes ago, farnz said: I recall that some time ago there was a vendor on eBay who was selling the focussing mount/conversion kits for the 90/2.8 Sonnar, or if you sent him your 90/2.8 Sonnar he would convert it for you for a quite reasonable charge, or he would sell you a converted 90/2.8 Sonnar - whichever you preferred. I don't recall him offering other Contax G focal lengths at the time but he might have branched out by now. Pete. I just found available  on eBay various  Hawks conversion kits for the 21, 28, 35 and  45mm Contax G lenses but at a price: https://www.ebay.fr/sch/leica898/m.html?item=124558989430&rt=nc&_trksid=p2047675.l2562 Best, JM Edited April 13, 2021 by JMF Link to post Share on other sites More sharing options...
Guest JMF Posted April 13, 2021 Share #8  Posted April 13, 2021 (edited) More about these types of conversions discussed  on RFF: https://www.rangefinderforum.com/forums/showthread.php?t=173261&highlight=45+contax  Cheers, JM Edited April 13, 2021 by JMF Link to post Share on other sites More sharing options...
ocean2059 Posted April 13, 2021 Share #9  Posted April 13, 2021 12 minutes ago, JMF said: More about these types of conversions discussed  on RFF: https://www.rangefinderforum.com/forums/showthread.php?t=173261&highlight=45+contax  Cheers, JM I purchased a copy of the Contax G35 converted-to-M lens and it works perfectly on my M9/MM.. It was said that the vendor in Hong Kong will release a G45 version of the lens soon.  1 Link to post Share on other sites More sharing options...
Guest JMF Posted April 13, 2021 Share #10  Posted April 13, 2021 (edited) 53 minutes ago, ocean2059 said: I purchased a copy of the Contax G35 converted-to-M lens and it works perfectly on my M9/MM.. It was said that the vendor in Hong Kong will release a G45 version of the lens soon.  I have a leica M converted G45 f2 lens. A fine performer  , unfortunately not with me at the moment . Edited April 13, 2021 by JMF Link to post Share on other sites More sharing options...
Krycek Posted September 9, 2023 Share #11  Posted September 9, 2023 The manufacturer "rework-lens" sells Leica M-mount converters for Contax 21, 28, 35 and 45 on Ebay. But I can't find any more information on the subject. https://www.ebay.de/str/reworklens?mkcid=16&mkevt=1&mkrid=707-127634-2357-0&ssspo=PYpjxpJ9Szu&sssrc=3418065&ssuid=CmGjtfulSqa&widget_ver=artemis&media=COPY 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/319827-contax-g-lenses-on-digital-m-bodies/?do=findComment&comment=4853558'>More sharing options...
Ecar Posted September 9, 2023 Share #12 Â Posted September 9, 2023 Funleader (the HK seller referred to in the previous posts, I believe) makes pretty good G35 and G45 non-destructive conversion kits. Not sure if G35 is still available, as it's not for sale on their website at the moment. Link to post Share on other sites More sharing options...
Krycek Posted September 10, 2023 Share #13 Â Posted September 10, 2023 vor 18 Stunden schrieb Ecar: Funleader (the HK seller referred to in the previous posts, I believe) makes pretty good G35 and G45 non-destructive conversion kits. Not sure if G35 is still available, as it's not for sale on their website at the moment. Yes, but they don't have any solutions for 21 and 28 mm. Link to post Share on other sites More sharing options...
smcmason Posted January 10, 2024 Share #14  Posted January 10, 2024 On 9/9/2023 at 5:41 AM, Krycek said: The manufacturer "rework-lens" sells Leica M-mount converters for Contax 21, 28, 35 and 45 on Ebay. But I can't find any more information on the subject. https://www.ebay.de/str/reworklens?mkcid=16&mkevt=1&mkrid=707-127634-2357-0&ssspo=PYpjxpJ9Szu&sssrc=3418065&ssuid=CmGjtfulSqa&widget_ver=artemis&media=COPY 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!  Wanted to let anyone who might be interested know that I just received my 28, 45, and 90 conversion kits from this seller. I asked many questions before buying and they were helpful and responsive. I have converted all three and they look and feel fantastic. Much better than I expected, and significantly better than the photos in the listing, I think. Have only used them on a film camera so far but am happy to follow up with digital tests if anyone is interested. They didn't have all of the helicoids listed when I first started looking, but when I messaged them asking about the rest, he did have some and immediately listed them for sale. Quite happy so far!   4 2 Link to post Share on other sites More sharing options...
Carlos cruz Posted January 10, 2024 Share #15  Posted January 10, 2024 I have converted planar 45, took me 10 mins and I am really happy with the  lens.  Did you convert 90 yourself, I’ve read that it’s a bit more complicated process involving grinding cam follower. Link to post Share on other sites More sharing options...
smcmason Posted January 10, 2024 Share #16  Posted January 10, 2024 25 minutes ago, Carlos cruz said: I have converted planar 45, took me 10 mins and I am really happy with the  lens.  Did you convert 90 yourself, I’ve read that it’s a bit more complicated process involving grinding cam follower. I was willing to try the 90mm conversion myself, but the seller also said it was quite tricky and offered to sell me a pre-converted lens for a good price. I ended up taking that offer instead. 3 Link to post Share on other sites More sharing options...
Krycek Posted October 3, 2024 Share #17  Posted October 3, 2024 There is also MrDing, a manufacturer that makes conversion kits for 45 f2.0 Conversion Kit V2.0: - Conversion Kit (Black or Silver) : $538.00 USD  - Whold Lens (Contain glass Black or Silver) : $996.00 USD 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! https://mrdingstudio.com/products/contax-g45-2-for-leica-m-mount-conversion-kit  Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! https://mrdingstudio.com/products/contax-g45-2-for-leica-m-mount-conversion-kit  ' data-webShareUrl='https://www.l-camera-forum.com/topic/319827-contax-g-lenses-on-digital-m-bodies/?do=findComment&comment=5640850'>More sharing options...
Krycek Posted October 3, 2024 Share #18 Â Posted October 3, 2024 On 1/10/2024 at 6:13 PM, smcmason said: I was willing to try the 90mm conversion myself, but the seller also said it was quite tricky and offered to sell me a pre-converted lens for a good price. I ended up taking that offer instead. Are you completely satisfied with your modified 90 mm? Link to post Share on other sites More sharing options...
smcmason Posted October 14, 2024 Share #19 Â Posted October 14, 2024 On 10/3/2024 at 2:09 AM, Krycek said: Are you completely satisfied with your modified 90 mm? I was completely satisfied with the results, however the kit itself felt a little clunky. The throw felt a bit uneven. I ended up selling the set. Someone more experienced than me could have almost certainly taken it apart and adjusted it to be fine. I was concerned about making it worse. The person who bought the set from me was aware of the 'stickiness' and had all three recalibrated by a professional - he said they worked wonderfully. 1 1 Link to post Share on other sites More sharing options...
Leicaboy Norway Posted October 15, 2024 Share #20  Posted October 15, 2024 The 45 mm f2 is a legendary lens measured to have the best resolution on film for 35mm next after Canon 300mm f2 if I remember correctly.  I used to have it but sold it with the contax g2. With an adapter I used it some for the Leica sl2 (photos shared on the forum). Reason for selling it was mainly that I felt it was vulnerable to keep a $2000 kit that could break anytime with all the electronics. Plus the adapter made the manual focus a bit difficult. The focus ring was too stiff.  But if I encountered a 45mm contax g convertered to leica m and with the right calibration and a better manual focus experience I'd buy it if it was OK priced. 1 Link to post Share on other sites More sharing options...
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