Godfrey DiGiorgi wrote:
On Apr 4, 2009, at 2:37 PM, Cotty wrote:
The very first time I ever used a legacy K mount manual focus lens on a
modern Pentax DSLR, it worked perfectly.
The lens had no aperture lever.
Simplicity is best.
Your modified K mount lens works as if it were an M42 thread mount
lens, which meter perfectly in both AV and manual modes, since you're
manually controlling the iris. It's the funky semi-automatic stopdown
metering stuff that doesn't quite work correctly.
That makes the whole issue even weirder, doesn't it? You'd think that
the camera would get exactly the same values if it stops down then
meters, that it does if it meters while being stopped down all the time.
But maybe someone has tried to be clever in some way with that
semi-automatic mode, and made it do something other than just stopping
down and metering?
Godfrey
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