With all this discussion about the KAF mount, here's a timely malfunction.
I just picked up two rolls of slide film, only to find that both were
overexposed. Some frames were slightly over exposed, most were at least a
stop over.
Both rolls were shot with my newer Pz-1p, A* 400 f2.8, and F1.7x AF
adapter. Everything looked ok when I checked out the camera, until I
started clicking the aperture ring on an FA lens. When I move the aperture,
the camera reports an aperture 1/2 to 1 stop smaller than the lens is
actually set for. So, with the ring set to f8, the Pz-1p will show f11 in
the finder, and in aperture priority or hyper manual the camera will adjust
the shutter speed to align with this erroneous aperture. Since the shutter
is a stop slower than it should be, and since the aperture is physically
set, the exposure is off.
Moving the aperture ring a little in the counter-clockwise direction
results in the right value being shown. I tested the lenses on my Mz-S and
other Pz-1p, and they work just fine.
The mis-read aperture is probably the problem and enough to warrant a trip
to Colorado for repairs. But here's what I'm wondering - when I used the
A* 400 f2.8 and 1.7x converter, I left the aperture ring in the A position
and set it by the body. For those who actually understand how the lens
mount works - would this apparent malfunction affect that? Or could there
be some other cause for the over exposure?
FWIW - the exposure problems appeared suddenly on frame 1 of a new roll of
film (the first of the two rolls I got back.) I used the same body and
lens combo with about a dozen other rolls in the last few weeks, and they
all were just fine, including the roll immediately preceding the first over
exposed one. There is even some overlap in the subject / scene between
those two rolls. Since one roll was OK and the next overexposed, I
initially thought that the body mis-read the ISO of the film cartridge, but
I now doubt that was the problem. Could I have somehow don something while
changing film to cause this? It was a pretty uneventful swapping of film
cartridges - I was not in a hurry or anything.
TIA -
MCC
- - - - - - - - - -
Mark Cassino
Kalamazoo, MI
[EMAIL PROTECTED]
- - - - - - - - - -
Photos:
http://www.markcassino.com
- - - - - - - - - -
