I had converted a 3 Cam 50mm Summicron, a 3 Cam 90mm Elmarit and a R Cam 35mm Elmarit (very late production) to Nikon F mount with the Leitax converters to use with film and with my D700....and it was eye-opening how awesome these lenses are on a decent digital camera. However since getting an M8 and now M9, I converted them back to 3 Cam to use with a recently acquired, mint minus Leica SL (2nd version - cost me $89 for the camera). I gave a machinist at work the mount for the R Cam 35mm Elmarit to remove the extra material Leica added to prevent using with older Leica SLRs, and Leica sent me the third Cam and tiny screws - and now it meters and works perfectly with the Leicaflex SL. Anyone using these lenses on Nikon (or Canon) DSLRs I urge you to get the late model 35 Elmarit as I find it quite good on digital Nikon FX.