Archived posting to the Leica Users Group, 1999/01/25
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]>LEICAMAN56@aol.com wrote: >> >> In regard to the 50 DR and the "rigid" mount lenses, they are the same optical >> design. I have heard that the Leitz factory selected the "better" performing >> lens heads for use with the DR mounts as they were to be used in more critical >> applications such as the close up range. True or old wives' tale? Perhaps >> Erwin could shed some light on this. >> >> Bill Rosauer > >I recall reading or hearing that the DR were selected from lensheads >that measured an actual focal length of 51.9 mm after the elements and >cells were assembled. Supposedly 51.9 mm was the focal length used in >the computation of the lens. > >I too call for Erwin on this one. > >Dennis > I believe that the Original Anastigmat, then Elmax, then Elmar lenses on the Leica I's (A) were actually 51.9mm even though stated to be 50mm. If that is the case, I wonder if any other or all Leica 50mm Lenses are really designed to be 51.9mm?? Mark Hammons