Posted by Gilles Langlois on August 24, 2000 at 18:18:30:
In Reply to: 23 roll holder film flatness problem posted by Greg Rust on August 24, 2000 at 14:54:27:
Hi!Event though the Graflex roll film back are holding the film
flatter than every other type of roll film back,it should be those
with the small rollers near the window.Apparently some "23" model
were delivered with these but they are more likely to be on the
later version,Singer/Graflex RH/8-RH/10-RH/12 and RH/20.I have
added rollers to my "23" model but it was not an easy process to
find the custom parts.You can make a test in jamming something
between the frame of the the window and the film to hold it tight
and flat and this way you will see if the problem is really
there.But it is a known fact that without the roller,specially at
wide aperture,you can have sharpness problem.Hope all this
helpful,Gil. I recently bought a Century Graphic with the
101mm
: Ektar lens. I have not neen able to get sharp
: negatives with it and I believe that the problem is
: that the film is not quite flat against the pressure
: plate.It seems to bulge through the 6x7 window. The
: camera, roll film back, and lens are in excellent
: condition. Could this bulging of 1 to 2mm be the cause
: of the out of focus negatives? I've set the focus at
: infinity and nothing in the depth of field is sharp.
: Could newer film be thiner and more flexible than roll
: film in 1950?