On Apr 23, 2006, at 3:54 PM, Adam Maas wrote:
I'll just note that M42 lenses get full function in Av mode, as
long as you don't have them set on AUto (which you shouldn't when
using an adaptor).
That's misleading, Adam.
M42 lenses function Av mode, just like M/K-bayonet lenses. The fact
that they must *always* be stopped down to working aperture manually
(no auto-iris diaphragm support at all) for metering and exposure
makes them less desirable in some ways than the M/K-bayonet lenses.
On the other hand the fact that they can be used throughout their
aperture range makes them more desirable in others. They're subject
to the same restraints on metering pattern (spot or CW averaging) as
M/K-bayonet lenses.
I'd hardly call that "full function"...
Godfrey
