On 16 Sep 2004 at 21:34, Paul Stenquist wrote: > Perhaps you're doing something wrong? My shots with A and FA lenses are > as accurate in terms of exposure as are my shots with M and K lenses, > where I set aperture on the lens. Even when you set aperture on the > lens, you're relying on a mechanism to stop it down when you release > the shutter. Is the mechanical linkage more accurate than an electro > mechanical device? I doubt it.
I notice the difference when I'm doing technical shooting in studio and very obviously during lens testing. The setting mechanisms work quite differently, when the lens is pre-set via the mechanical ring the actuator lever doesn't control the final aperture, it is a mechanical limit in the lens that does and it is very consistent. When setting the aperture from the body the aperture lever has to move to a prescribed and repeatable location in a split second, this doesn't always go as planned. I'm simply not doing anything wrong, the camera is. Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications/ Pentax user since 1986, PDMLer since 1998
