[rollei_list] Re: OT: Tessar 2.8/45 "Pancake" for Contax/Yashica

Marc James Small wrote:

The first SLR wide-angle, way back when, was the CZJ 4.5/4cm first produced
for the Kine Exakta in FEB 1939 and then brought out in M42 in AUG 1945.
Mine is T coated and dates from 1948.

And, yes, that need to cleear the mirror explains why the lens was only an
f/4.5!

Marc


Great and interesting history, Marc. We know that each maker and design will have different minimum mirror clearance distances, and we are talking about just a few millimeters here. Here is a table of interest compiled by Ken Ruth:

http://www.baldmtn.com/MMLENS2.htm

The lowest number for an SLR on this particular source is for the KONICA AUTOREFLEX at 40.5MM


Eric Goldstein
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