At 03:50 AM 1/9/2009, you wrote: >I think the word "telescope" was confusing Richard, however later >Leica SM models have viewfinders with 1.5x magnification, being the >baseline physical length about 38mm x 1.5= 57mm for the effective >baseline, shorter than the Contax II effective baseline clearly, >anyway a good effective baseline for focusing. >I have the book "35 MM Photo Technique" by H.S. Newcombe, it shows the >Contax and Leica SM and Ektra rangefinder designs, they are pretty >different (the Ektra has a "split field" RF type).The author writes >the cameras physical baseline length only, not the effective baseline. >The two wedges in the Contax RF are significant to keep the RF >calibration even for worst situations. > >An interesting comparison about the new Zeiss Ikon RF and Leica M7: > >Zeis Ikon RF >75mm x 0.74 magnification with an effective length of 55.5mm > >M7: >69.25mm x 0.72 magnification, with an effective length of 49.9mm. > >"...prewar Contax of Zeiss Ikon AG were always superior to Leica. >Indeed, the Contax was known, thanks to its long rangefinder baseline, >for the highest accuracy in measurement of object to camera distance >for precise focusing." (Shutterbug, S.Takeda, April 2005) Newcombe wrote some interesting books. A highly recommended author!I'm sending you directly a PDF file listing some RF effective RF baselines taken from a table in a book I was once writing on the history of the Leica camera. I'll add your latest information to the table, just to keep it current!
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