Archived posting to the Leica Users Group, 1997/04/21
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 11:09 PM 4/21/97 -0600, you wrote: >Hello, > >I am new to this list and Leica. > >Could some one explain to me all of the variations of the Leica >reflex camera lens mount. 1,2, and 3 cam, why Tamron has a R4 >ONLY adapter. What was Leica thinking? > >Jerry >corlock@pioneerplanet.infi.net > > Leica R lenses for Leicaflex cameras with external meter are single-cam lenses (one axial cam.) Leica R lenses for TTL meter Leicaflex cameras are two-cam lenses (two axial cams.) Leica R lenses for Leica-R cameras (R3 - R8) are three-cam lenses (two axial & one rotational cam.) A version of the 50 mm f/2 Summicron-R with only the rotational cam is made for use on *any* R camera (R3 - R8.) It is engraved "FOR LEICA R ONLY" and will not work properly on any Leicaflex body. The tamron adapter has only a rotational cam. It should work on any R camera. You may use any Leicaflex or Leica R lens on any reflex body without worry of damaging your camera or lens. All reflex lenses (except the rotational only lens) will work on any Leicaflex or Leica R camera body. If you use a one or two cam lens on a Leica R body, you must stop down the lens to take a meter reading. Otherwise the reading will be wrong. Likewise using a one cam lens on a Leicaflex with TTL metering. Jim