Archived posting to the Leica Users Group, 1998/03/29
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 09:21 AM 29-03-98 -0800, you wrote: >> >> The focal length by definition increases as you focus closer than >infinity, >> but the Leica rangefinder is designed for infinity focus only. So the >> imaginary meter area in the vf must be increased to compensate. >> >> Dan C. > >Is it the case that the viewfinder is designed for infinity focus? I >thought the opposite was true. I seem to recall a posting on this list >stating that at infinity the 75mm viewfinder frame coresponds to the area >of a 90mm lens. > Actually, the frames correspond to the close focusing point of the lens, so perhaps the figure quoted in the manual is for this distance as well. Certainly, if it is 23% at the close distance, the figure will be less at infinity, since the effective focal length is less. Dan C.