Boris Liberman wrote: > So if I were to modify K/M lens so that it would have proper contacts > and transfer widest/narrowest aperture value to the body, would > *ist(D) be able to meter in fully manual mode? If so, we might be in > not so bad a shape.
It is not possible to midify an SMC or SMC-M lens to behave like an SMC-A. The reason is that the former ones have a logarithmic aperture coupling and the latter a linear one. The *ist D requires linear, so even if you modify the lens mount to simulate the presence of the SMC-A contacts, the aperture will not operate properly. Furthermore, such a modification would simulate an SMC-A lens set to a numeric aperture, and the *ist D requires as minimum and SMC-A lens set to "A". Cheers, Boz
