At 7:00 PM +0100 7/18/01, Keith Green wrote:
>It isn't caused by how the long the film is static at the exposure position
>is it.
>By which I mean if you shoot several frames off very quickly they wouldn't
>have such a mark except possibly on the first one.
Hm. That seems unlikely to me. The patch would appear to be caused
by differences in reflectivity between the pressure plate and the
hole. I don't see how the time the film remains in one position could
factor into this, since the patch isn't caused by light coming in
from anywhere other than through the lens. Shutter speed *may* be a
factor, but that's a different issue from how rapidly the film is
moved through the film transport mechanism. It's not like the IR
diode sensor fogging problem, in which the amount of time the film
spends next to an active LED sensor will obviously affect the amount
of fogging.
>Anyway, you can always stick some metallic tape on the back of the camera
>opposite the hole in the pressure plate.
I haven't tried anything yet, but the tricky part will be getting
the same reflectivity as the black-coloured pressure plate, it seems
to me. Metallic tape on the camera back interior wouldn't do that.
- Neil K.
*
****
*******
***********************************************************
* For list instructions, including unsubscribe, see:
* http://www.a1.nl/phomepag/markerink/eos_list.htm
***********************************************************
