I believe that any Ricoh-brand lens that features the P setting is in danger of locking onto any Pentax AF body. In other words, any Rikenon P lens.
The older, XR Rikenon lenses are safe. Chris raised the larger question: "Did Vivitar, or any other company, make lenses for Ricohs that cannot be used on an MZ body, or was it just Ricoh who made them?" In the five years I've been on the list, postings have named Ricoh as the only brand whose lenses could be a problem. With all the Tokina fans on this list, I would think that someone would have alerted the list by now if a Tokina lens were a problem. As for Tamron Adaptall, I assume one should be careful to use the K, KA, or KAF mount, and not the Ricoh mount. 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. [EMAIL PROTECTED]
