Paul Stregevsky asked; <<Perhaps someone can clarify the situation with Chinon lenses. As I recall, Chinon designed its bodies to work in Program mode with both Rikenon P and Pentax A lenses. I don't know which contact was used by its own lenses, the A or the P.>>
I have both a CP-5 and CP-6 bodies which have 2 level program modes, P1 and P2. I also have the normal lens associated with these cameras, 50mm f1.8. It looks just like an "M" series lens. There is NO electrical contact between the lens and body other than the aperture lever, i.e. there is no "A" or "P" setting on the lens. Here is how I understand it works. On the lens the f16 is in green and the P1 and P2 settings on the camera are also in green. According to the user guide the camera assumes f16 as the min aperture when using the program mode and makes its exposure adjustments based on that assumption. You can use any lens, not just Chinon, in program mode if you just manually set the lens to F16 when using either program mode. I use all of my K-mount lenses on these bodies with no problems, but admit that I do not use the program modes very much at all, but it does work. I tend to use the aperture priority mode or the manual mode. On my PZ-20 the 50mm f1.8 Chinon seems to work like any "M" series lens, the camera defaults to manual mode, set the aperture on the lens and adjust the exposure using the wheel. There is nothing on the mount of the lens to interfere with anything on the body mount. I don't know anything aboout any later versions of Chinon lenses. Chinon did have an autofocus lens available for this body but it was fully self contained utilizing a set of 3 electrical contacts on the outside of the lens mount, under the right side of the pentaprism, but no mechanical connections. I have seen these lenses on ebay but have had no desire to purchase one. Jerry in Houston
