> I don't believe that Pentax will built a motor into a low budget lens. > That's paradox. And BTW why should they make the apperture control > technically more complicated? Another point is the fact that the *ist > has a KAF mount, i.e. it has no way to transfer the necessary power to > the lens.
Electronic coupling can be cheaper than mechanical coupling, even with a micromotor driving the aperture mechanism. Why do you think Canon and Nikon made it in the first place? It makes it technically LESS complicated. About Pal's first comment - I found a strange image, the only image AFAIK so far of FAJ's and IST D's lens mounts... at dpreview. See it at http://www.volny.cz/fotof/temp/lens.jpg with the interesting part "buttoned" (sorry but I don't remember in which news item of dpreview.com it appeared). Notice the yellow/golden line near the aperture coupling... I never saw this on any other pentax lens. I don't draw any conclusions, just ask your opinion. Frantisek
