I've been thinking about this for a while. Typically, in program modes with a FA lens, the camera will keep the shutter speed high enough to avoid blurry pictures when handheld. On a 35mm sized filmplane camera, this is roughly the inverse of the focal length, as we all know. So if you have a 50mm lens, 1/60 is the minimum the camera stays at (1/30 sometimes, but even that is acceptable.)
It seems as if Pentax didn't update that part of its programs for the aps sized sensors. With a FA50mm on the istD, I keep getting 1/30s, even if the aperture is not full open (for example, I will get 1/30 at f:2.8 with the FA50/1.7, instead of the more acceptable 1/60 at f2). A 50mm on the istD is equivalent to roughly 75mm, so shouldn't 1/60 or 1/90 be the minimum speed the program chooses? Or am I very wrong? j -- Juan Buhler http://www.jbuhler.com photoblog at http://photoblog.jbuhler.com
