--- Joseph Tainter <[EMAIL PROTECTED]>: > Is anyone else not worked up over this?
I'm not worked up about it either. If it will work on existing Pentax bodies, I think it's a nice feature (but not important). If these lenses will initially autofocus ONLY on the K10D, I think it is a stupid choice since that would make those lenses much less desirable to current Pentax D-SLR owners. Having used all sorts of AF motors, the ultrasonic ones are definitely nice. They are the quietest and given a good body (good AF sensors and software), fastest. There are all sorts of technical advantages to having the motor in the lens (not just ultrasonic motors, but any motor) - for one thing, there is no mechanical linkage between the body and lens, which makes fewer things to break. Also, each lens can have the motor optimized specifically for THAT lens; an in-body motor must be designed for an "average" lens. It is worth noting that in many camera systems, ALL lenses have in-lens motors and bodies do not have AF motors at all. The first to do this was of course the Canon EF mount. Most new AF mounts designed since then have also been all-electronic (no mechanical AF or aperture connections) e.g. the Sigma SA mount, the FourThirds mount, the Contax N and 645 mounts and so on. But overall, I do not find it especially exciting. I don't do a lot of high speed work with long lenses so a slightly faster AF system is not a really big deal to me. I am more concerned with accuracy than speed. New Doug __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
