can add the basic aperture communication, which enables matrix metering as
it's just contact patterns on the mount, but there's also the A contact which
indicates if a lens is set to A. F, FA, DA and D-FA lenses have an extra
contact which transmits information between lens and camera.
I don't know if the -D does this, but the -DS does not. I
modified an old -M lens to tell it what min/max aperture ranges (by
drilling insulating holes). I did not put the 'A' pin on it, so the -DS
ignores the other sense holes for matrix metering. If you did put the 'A'
pin on it, it wouldn't actuate the aperture lever fully under all
conditions... like when the built-in program thought f/22 would be
appropriate, but you had it set to f/8.
-Cory
--
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* Cory Papenfuss *
* Electrical Engineering candidate Ph.D. graduate student *
* Virginia Polytechnic Institute and State University *
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