dkCambridgeshire Posted April 28, 2015 Share #1 Posted April 28, 2015 (edited) Advertisement (gone after registration) Last Saturday Leica Society colleagues at TLS AGM Weekend experienced vignetting when using my Leitz 800mm Telyt S lens on their M240 cameras via a Leitz 22228 'R' to 'M' adaptor. The 22228 was originally designed in the 1970s for adapting 'R' lenses to a Leicina cine camera but is not suitable for FF digital use because of its relatively narrow internal diameter which inevitably causes vignetting. I was unaware of this fact and had only previously used the adaptor on the Leica T APS format. After discovering the vignetting problem I sourced a s/h Novoflex LEM/LER adaptor which arrived this morning - whence the two adaptors were compared side by side and their internal diameters scribed with a pencil and measured: 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! The Novoflex LEM/LER adaptor has a 38mm internal rear diameter compared to 32mm for the Leitz 22228 - hence the vignetting problem. Best wishes dunk Edited April 28, 2015 by dkCambridgeshire 1 Quote Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! The Novoflex LEM/LER adaptor has a 38mm internal rear diameter compared to 32mm for the Leitz 22228 - hence the vignetting problem. Best wishes dunk ' data-webShareUrl='https://www.l-camera-forum.com/topic/244329-why-the-leitz-22228-r-to-m-adaptor-vignettes/?do=findComment&comment=2806166'>More sharing options...
Advertisement Posted April 28, 2015 Posted April 28, 2015 Hi dkCambridgeshire, Take a look here Why the Leitz 22228 'R' to 'M' adaptor vignettes. I'm sure you'll find what you were looking for!
jaapv Posted April 28, 2015 Share #2 Posted April 28, 2015 The reason is because it is not really an M adapter. It was designed for a movie camera, the Leicina. I posted about it a couple of times. Quote Link to post Share on other sites More sharing options...
jpattison Posted April 28, 2015 Share #3 Posted April 28, 2015 (edited) Yes, but it was great with the R 21mm f3.4 Super Angulon (for the Leicaflex mk I and II) on my M5 in the '80s after modifying the mount to stop the meter arm raising! The rear of the lens protruded through! John Edited April 28, 2015 by jpattison Quote Link to post Share on other sites More sharing options...
bocaburger Posted April 28, 2015 Share #4 Posted April 28, 2015 (edited) I have the current Leica R/M adapter and vignettes with my 400/6.8 Telyt-V and 14167 V-R adapter, but not with the Novoflex. I haven't measured to compare their I/D but I can see clearly the Leica has a thicker internal baffle, which would account for the vignetting. Edited April 28, 2015 by bocaburger 1 Quote Link to post Share on other sites More sharing options...
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