Posted by BERT on October 28, 2000 at 01:45:01:
In Reply to: Want to change Ground glass posted by Kaleung Ho on October 25, 2000 at 21:57:41:Registration I assume to mean---the rough side
of the Ground glass, is in the same location as
the film is when installed--if you add a frensel
lens, you must compensate for its thickness, or
the photos will be out of focus, by the thickness
of the frensel