: Hang on a minute, though, if I understand this correctly, the double
: cable release system will only stop the lens down when the shutter is
: released, which is only half the problem solved. The other half is
: telling the camera body what aperture has been set - how does that
: happen?
It doesn't. The camera thinks at all times the lens is wide open. In Auto Mode,
it
doesn't matter. Light is measured OTF after the aperture is stopped. For Manual
Mode or when working with a manual camera, the front plate of the Auto Bellows
has
a lever that closes the auto aperture for metering. And of course, not only the
light value (subject reflectance) and aperture value determine exposure, but
also
the bellows extension.
H@nz
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