I have a Koni Omega (coincidentally, a 6x7) and some of the backs have
had edge shadow poroblems. I finally concluded that the pressure plate
on the back was not firmly tight, so that a little bit of light was
admitted to the area beyond the bounds of the negative. My remedy was
to adjust the springs behind the pressure plate.


Francis A. Miniter


Don wrote:

I just developed a couple of 6x7 negatives from a mamiya rb67 camera and
some of the frames have a very light shadow on the edge of the frame. There
is no detail in the shadow just a very light shadow along the left and right
sides of the image. It is not there on all frames. When comparing the
affected frame with that of a good one the image area is equal except the
slight increase that the shadow creates.

Any ideas as to why this may be happening. I assume it is no real big deal
as it does not seem to affect the image within the frame but I am curious as
to why this happens.

Don