Doug, All true, but I've never seen or heard of a RIGID f3.5 Tessar in a Contax mount. BTW, have you seen Harry Scherer's prices to refurbish a Contax ? A IIa for example, which would be the most simple of the Contaxes. Is it true that Contaxes have all the controls etc. in the opposite direction because E. Leitz had the patent rights to a right hand thread? :-) Jerry Jerry, Henry has done six cameras for me, and I honestly consider his fee an absolute bargain for the work he performs. More cameras are ruined or superficially treated by hacks that don't do the thorough disassembly, cleaning, lubrication, and adjusting that Henry does. When the camera is returned from his shop it is right, and will perform as it was designed for many years. If attachments are allowed on the list I'll send a picture of a rigid 50/3.5 Tessar on my Contax II (I just happened to have a shot available), it's a lovely little lens -- different in appearance from the other Zeiss lenses of that era. Doug