Clickie McPete Posted December 3, 2012 Share #1 Â Posted December 3, 2012 Advertisement (gone after registration) I have read that there are M to R adaptors and I'm curious if they can be used with lenses other than the big telephotos that they appear to be made for. For example, can you use one with a Voigtlander 12mm M mount to achieve super wide images on a Leicaflex body? Thanks in advance... Link to post Share on other sites More sharing options...
Advertisement Posted December 3, 2012 Posted December 3, 2012 Hi Clickie McPete, Take a look here Using M Lenses on R Bodies?. I'm sure you'll find what you were looking for!
naturephoto1 Posted December 3, 2012 Share #2 Â Posted December 3, 2012 I believe that using a Leica M lens on a Leica R body does not allow infinity focus. Â Rich Link to post Share on other sites More sharing options...
Michael Geschlecht Posted December 3, 2012 Share #3 Â Posted December 3, 2012 Hello Clickie & Rich, Â Welcome to the Forum. Â All lenses are designed to be placed a cetain distance from an image plane. M lenses are designed so that the distance from the rear of the lens mount to the image plane is 27.8mm when the lens is focussed @ infinity. Some of the longer M lenses have removable sections which can be changed & replaced w/ other shorter sections which adapt the lens to the 47mm distance, lens mount to image plane, which is required for the Leicaflex/R cameras in order that the lenses clear the mirror in the mirror box when they are focussed @ infinity. Â When you use a lens which is designed to focus to infinity when it is mounted on an M on a Leicaflex/R without adapting the mount you effectively move the lens's optical elements forward the same way you do when you focus a lens on a closer object. This means shorter M lenses w/ adapters allowing them to be used on Leicaflex/R's will be usable for closeups @ various distances but these same lenses are not usable w/ distant subjects on a Leicaflex/R. Â Best Regards, Â Michael Link to post Share on other sites More sharing options...
naturephoto1 Posted December 3, 2012 Share #4  Posted December 3, 2012 Hello Clickie & Rich, Welcome to the Forum.  All lenses are designed to be placed a cetain distance from an image plane. M lenses are designed so that the distance from the rear of the lens mount to the image plane is 27.8mm when the lens is focussed @ infinity. Some of the longer M lenses have removable sections which can be changed & replaced w/ other shorter sections which adapt the lens to the 47mm distance, lens mount to image plane, which is required for the Leicaflex/R cameras in order that the lenses clear the mirror in the mirror box when they are focussed @ infinity.  When you use a lens which is designed to focus to infinity when it is mounted on an M on a Leicaflex/R without adapting the mount you effectively move the lens's optical elements forward the same way you do when you focus a lens on a closer object. This means shorter M lenses w/ adapters allowing them to be used on Leicaflex/R's will be usable for closeups @ various distances but these same lenses are not usable w/ distant subjects on a Leicaflex/R.  Best Regards,  Michael  Thanks Michael,  I had for the time being forgotten about the lenses like my f6.8 560mm Telyt lens and its mate the f6.8 400mm Telyt and I believe the f5.6 versions of these lenses.  Rich Link to post Share on other sites More sharing options...
jaapv Posted December 3, 2012 Share #5 Â Posted December 3, 2012 It is possible to mount lenses with detachable lens heads by combining adapters or on a bellows, and longer Visoflex lenses that require a mounting ring, and Visoflex teles on a Televit. Link to post Share on other sites More sharing options...
Clickie McPete Posted December 3, 2012 Author Share #6 Â Posted December 3, 2012 Thank you for the detailed replies. I figured that was the case but was not sure of the specifics. Link to post Share on other sites More sharing options...
robsteve Posted December 4, 2012 Share #7 Â Posted December 4, 2012 Advertisement (gone after registration) I have read that there are M to R adaptors and I'm curious if they can be used with lenses other than the big telephotos that they appear to be made for. For example, can you use one with a Voigtlander 12mm M mount to achieve super wide images on a Leicaflex body? Thanks in advance... Â Although it is probably not what you meant when you said Leicaflex, but the original LeicaFlex had a mirror lock up to use a 21mm Super Aungulon f3.4 lens where the element was very close to the film plane, like on a rangefinder. The mirror was locked up, the 21mm mounted and an external finder was used. If you had such a Leicaflex and a creative camera tech, they may be able to mount the 12mm. T Â the question is why would you want to do it when you could just mount it on a M mount camera from M1 to M 240. Â http://photo.net/leica-rangefinders-forum/00R5jN Link to post Share on other sites More sharing options...
Clickie McPete Posted December 5, 2012 Author Share #8 Â Posted December 5, 2012 Why would I want to do it? Well I do like M bodies and own several along with a bunch of glass. But there's something really nice about a fully manual SLR too and I've been missing that style of focusing. I picked up an SL, SL2, and an original Leicaflex recently along with several lenses. The early R bodies seem to be about the pinnacle of 1970's SLRs for me, far nicer to my mind than anything else I've played with so far. And price wise compared to the M equipment they seem like a steal for images that are very similar in quality. I'm still trying to decide which body I like the best of the three and so far the Original is winning with the SL a close second. I'm not as fond of the split image in the center of the SL2 but maybe I'll get used to it. Link to post Share on other sites More sharing options...
Michael Geschlecht Posted December 5, 2012 Share #9 Â Posted December 5, 2012 Hello Clickie, Â The 21mm F3.4 is only usable on the "Original" Leicaflex. The 1st model w/ the external CdS meter cell. Â It has the requisite mirror lock up not provided on subsequent models so that the mirror can be swung up & locked to allow the rear portion of the lens to slide in & sit inside the camera body & not damage the mirror. Â This combination requires the same 21mm finder that is used on the various M's. There is no thru the lens focussing. Â To use a 21mm lens & focus thru the lens with any Leicaflex you have to use the 21mm F4. A retrofocus design which replaced the 21mm F3.4. Â Best Regards, Â Michael Link to post Share on other sites More sharing options...
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