I made a Camera Obscurer for my wife's art class. I used a telescope objective of about 30 inches focal length, a front silvered large piece of mirror to shoot the real image up onto a piece of glass with waxed paper laid on top. It focused by sliding the front of the box. The image obtained was quite remarkable and about 10 inches square. I built it several years ago and still have it in the attic of my little workshop. It is cumbersome to use but does the job. Apparently this is what some old masters used to get the realistic perspective in their paintings.
My 5x7 is awaiting new bellows. I would like to photograph the ground glass with my Sony A850. Don't know how to do this exactly - should I replace the ground glass with clear glass and put some wax paper on it like the C.O.? I do have a Satin SnowTM screen as well as the standard screen supplied by Linhof. It has been suggested that the BossTM screen would be good since it has a wax layer.
Bookmarks