Jackbryan Posted November 3, 2016 Share #1 Posted November 3, 2016 Advertisement (gone after registration) Is there a way to mount a new m-mount lens on an old screw mount camera (Leica III)? Quote Link to post Share on other sites More sharing options...
Advertisement Posted November 3, 2016 Posted November 3, 2016 Hi Jackbryan, Take a look here M-mount to screw mount III. I'm sure you'll find what you were looking for!
jaapv Posted November 3, 2016 Share #2 Posted November 3, 2016 No. Quote Link to post Share on other sites More sharing options...
farnz Posted November 4, 2016 Share #3 Posted November 4, 2016 No, afraid not. Pete. Quote Link to post Share on other sites More sharing options...
earleygallery Posted November 4, 2016 Share #4 Posted November 4, 2016 The only way is with one of the rare limited edition LTM mount versions of the Summicron 35 / 50 M lenses. These were M lenses but made in LTM mount. The register distance is different on an M body. You can fit an LTM to an M but not the other way around. Quote Link to post Share on other sites More sharing options...
spydrxx Posted November 4, 2016 Share #5 Posted November 4, 2016 I think I remember somewhere in the distant past somebody going to the great expense of retooling his LTM body to use an M mount. Seemed ridiculous then as well as now. Quote Link to post Share on other sites More sharing options...
graphlex Posted November 4, 2016 Share #6 Posted November 4, 2016 (edited) I think I remember somewhere in the distant past somebody going to the great expense of retooling his LTM body to use an M mount. Seemed ridiculous then as well as now.DAG had one for sale on his site. The conversion was done by his father, Norman Goldberg. In addition, the LFI article on the IIIg published around 2007 showed an M-mount prototype of the IIIg produced by Leitz. Sent from my iPad using Tapatalk Edited November 4, 2016 by graphlex Quote Link to post Share on other sites More sharing options...
Michael Geschlecht Posted November 7, 2016 Share #7 Posted November 7, 2016 (edited) Advertisement (gone after registration) Hello Jack, Welcome to the Forum. Actually, there are a number of manufacturers who make adapters that will allow a bayonet mount "M" lens to be attached to a Leica Thread camera body. The problem is infinity focus. "M" bayonet mount lenses have a flange to film distance of 27.8mm when they are focused at infinity. Leica screw mount camera bodies have a flange to film distance of 28.8mm when lenses mounted on them are focused at infinity. A bayonet mount lens to screw mount body adapter has a thickness of more than "0". When you add this more than "0" to the 1mm difference between screw mount & bayonet mount lens flange to film distance you get a distance of 1mm + some other ammount of thickness: This is the distance that the lens is already sitting in front of the film plane before you are beginning to focus. Focusing then takes the lens even further from the film plane which means that the lens begins its focusing travel at a distance in the photograph which is closer than infinity. You can not focus a lens with this type of adapter on it correctly for a subject at infinity. There is also no rangefinder connection with this type of adapter. Best Regards, Michael Edited November 7, 2016 by Michael Geschlecht 1 Quote Link to post Share on other sites More sharing options...
behirsch Posted February 19, 2017 Share #8 Posted February 19, 2017 I've been looking for an M to LTM adapter but haven't found any. Can you tell me who makes them? The reason is that with live view it is possible to do close up photography without a Visoflex. However, the only extension tube I can find is the OUFRO, which is very short. I would like to use screw mount extension tubes (which I have) an LTM to M adapter (which I also have) and an M to LTm adapter (which I don't have), Quote Link to post Share on other sites More sharing options...
pico Posted February 19, 2017 Share #9 Posted February 19, 2017 (edited) I've been looking for an M to LTM adapter but haven't found any. Can you tell me who makes them? The reason is that with live view it is possible to do close up photography without a Visoflex. However, the only extension tube I can find is the OUFRO, which is very short. I would like to use screw mount extension tubes (which I have) an LTM to M adapter (which I also have) and an M to LTm adapter (which I don't have), I'm confused by the responses. I have several Leica screw-mount lenses with ordinary adapters to the M mount. Am I missing something? I also have several LTM extension tubes of various lengths. Again, what am I misunderstanding? . Edited February 19, 2017 by pico Quote Link to post Share on other sites More sharing options...
Exodies Posted February 19, 2017 Share #10 Posted February 19, 2017 I believe the required configuration is bayonet camera - screw tubes - bayonet lens. Quote Link to post Share on other sites More sharing options...
a.noctilux Posted February 19, 2017 Share #11 Posted February 19, 2017 I've been looking for an M to LTM adapter but haven't found any. Can you tell me who makes them? The reason is that with live view it is possible to do close up photography without a Visoflex. However, the only extension tube I can find is the OUFRO, which is very short. I would like to use screw mount extension tubes (which I have) an LTM to M adapter (which I also have) and an M to LTm adapter (which I don't have), Novoflex LEI-M but it must be difficult to find one or BEOON could be used : See this old link: http://www.l-camera-forum.com/topic/220403-m-to-ltm-lens-adapter-not-the-usual-ltm-to-m/ Quote Link to post Share on other sites More sharing options...
behirsch Posted February 20, 2017 Share #12 Posted February 20, 2017 Thanks to you who replied to my post. I traced out the leads and found that there is apparently only one adapter being made, the Novoflex Lei-M. It sells new for a healthy $150 in the US, and not much less for the only used one on eBay. Wow. I did find that for some reason it's available in Europe for the equivalent of about $90 and I'm waiting to hear what the shipping will be. I couldn't figure out if or how the connector that holds the LTM lens and M body of the BEOON comes off the stand for separate use, and if that would ruin things. Does anybody know? Quote Link to post Share on other sites More sharing options...
a.noctilux Posted February 20, 2017 Share #13 Posted February 20, 2017 ... I couldn't figure out if or how the connector that holds the LTM lens and M body of the BEOON comes off the stand for separate use, and if that would ruin things. Does anybody know? If you can find a BEOON complete set, the ring marked " 1:3 A " is normally mounted. Just unscrew it from the stand, like a lens in LTM, then you have a nice M mount female to LTM male. Quote Link to post Share on other sites More sharing options...
DenverSteve Posted May 26, 2023 Share #14 Posted May 26, 2023 On 11/3/2016 at 11:10 AM, Jackbryan said: Is there a way to mount a new m-mount lens on an old screw mount camera (Leica III)? As you've heard - no. However, I would call Leica as they may be able to remove the M mount and replace with LTM. Just a thought. Quote Link to post Share on other sites More sharing options...
Anbaric Posted May 26, 2023 Share #15 Posted May 26, 2023 2 Quote Link to post Share on other sites More sharing options...
a.noctilux Posted May 27, 2023 Share #16 Posted May 27, 2023 (edited) Not impossible ! Screw placements are weird though. 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! not mine ! Field selector not there just like my early M3 which in turn do have 50/90135 field in viewfinder "auto" selection by mounted lens Edited May 27, 2023 by a.noctilux 1 Quote Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! not mine ! Field selector not there just like my early M3 which in turn do have 50/90135 field in viewfinder "auto" selection by mounted lens ' data-webShareUrl='https://www.l-camera-forum.com/topic/266138-m-mount-to-screw-mount-iii/?do=findComment&comment=4780965'>More sharing options...
TomB_tx Posted May 27, 2023 Share #17 Posted May 27, 2023 (edited) Don Goldberg also once sold a one-off IIIg converted to M mount. It looked different than the official prototype though. Just checked his site: https://www.dagcamera.com/store/p199/Leica_lllg%2FM.html Edited May 27, 2023 by TomB_tx 1 Quote Link to post Share on other sites More sharing options...
Anbaric Posted May 27, 2023 Share #18 Posted May 27, 2023 (edited) 2 hours ago, a.noctilux said: Not impossible ! Screw placements are weird though. not mine ! Field selector not there just like my early M3 which in turn do have 50/90135 field in viewfinder "auto" selection by mounted lens I think this is my favourite ultra-rare Leica, much more interesting than a different paint job or a gold finish or a significant serial number or a special engraving. Nice internal frame counter and IIIf-style film reminder too (no dial on the back). I don't know what it sold for a few years ago, but the price would be crazy today. Is it fully functional, like the Goldberg conversion? Another oddity of this prototype is that it appears to have raised frames around the VF and frameline illuminator windows, M3-style. Perhaps it (or some of it) predates the released version of the IIIg, when Leica hadn't finalised the styling or decided how the frame counter and film reminder would work? Edited May 27, 2023 by Anbaric Quote Link to post Share on other sites More sharing options...
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