>> The "K" designation was unofficial. I think Pentax users just >> invented that to distinguish that first series of lens options >> from the later ones.
> Oh, I thought the "K" series matched the fact that they came out > with the "K" cameras, and the "M" series came out with the "M" > series cameras, and the "A" series came out with the "A" series > cameras??? At least, that is my interpretation, based on the > K-Mount Page... This is basically true. However, just remember that the "K" designation is an "unofficial" (user-invented) designation. In addition, the distinctions between each series is not always correctly applied by sellers (and I'm not just picking on eBay here, either) - it is not uncommon for some sellers to refer to ~any~ pre-A K-mount lens as an M lens, even if sometimes, of course, a particular pre-A lens might actually be a K lens. So it can be a case of "buyer be aware". Fred
