Thanks Arnold. I could live with (very easily) stop down metering with K lenses, but looks like that is not the case. It is weird that I can use my M42 1000/8 with stop down metering but not a K mount. Steve Larson Redondo Beach, California
----- Original Message ----- From: "Arnold Stark" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, August 15, 2003 6:26 AM Subject: Re: istdee > The *ist D does not have the aperture simulator coupling ring (you find > its coupling lever at 2 o'clock on your LX) that is needed so that the > camera knows how far the lens stops down during exposure. Without this > ring, and with any lens not in "A" position, open-aperture measurement > is not possible. Stop-down metering is possible with srew mount lenses > or lenses with fully manual aperture like the K500/f4.5 or the K28/f3.5. > Stop-down metering could also be possible with all lenses, if Pentax had > programmed the *ist D's meter to work when DOF preview is activated. > Unfortunately, Pentax did something else: In aperture priority mode the > meter works but the aperture always stays fully open. In manual mode > the meter does not work but the lens stops down during exposure. > > Arnold > > Steve Larson schrieb: > > >Looks to me like it has the aperture activator mechanism. I saved that jpeg of the istdee and enlarged it with ACDSee, it`s about 8 0`clock, looks just like the one in my LX. If that is indeed a mechanical actuator I don`t understand > >why a K or M lenses will not work. Steve Larson Redondo Beach, California > > > > >
