Hi Arnold, Arnold Stark wrote: > > One more thought: Maybe we are all right, and the *ist works with > K- and M-lenses, but only with stop-down metering?
I don't think so. Stop-down metering indicates that the lens lacks the mechanical aperture coupling. For example, if the aperture is deep into a tele lens, it is normally too complex to create a mechanical coupling between the aperture and the lens mount. This is why the Pentax shift lens has manual aperture and Canon's has fully automatic --- because they lead the aperture signals with flexible wires to the aperture-control mechanism which sits in front of the tilt-shift mechanism. The problem with the newset Pentax bodies is that the body is not able to read the aperture selected by the lens. It assumes widest aperture, and if you stop down 2 EV, the camera overexposes by 2 EV. I cannot imageine how much weight or money Pentax is saving by this, but it must be significant, since they have at least tree bodies with that mount (MZ/ZX 30, 50, 60). Cheers, Boz
