It could tell the user a lot about the working of a scanner of the type which uses a lenses to project the hard copy onto a CCD if one makes the following easy experiment. Use a 35 mm SLR camera, with either a macro lens or a close-up lens. Put a piece of paper (maybe with marks so something can be seen in the viewfinder) at the focus so the marks can be sharply seen in the viewfinder. Use a large format lens to project the image of some subject onto the other side of the same paper (this could all be done behind a LF camera.) adjusting so the image is sharp. Look at the image through the SLR viewfinder, then remove the paper. You will be seeing about what will be seen by a CCD in a scanner and I expect a small spot of image surrounded by darkness. The advantage of this over playing with the scanner itself is that you see the result instantly; no waiting for a scan to be completed. You can move the camera around and see how what is seen is affected. Bob Mueller Dr. Robert Mueller Institut für Festkörperforschung, FZ-Juelich D-52425 Juelich, Germany phone: + 49 2461 61 4550 FAX: + 49 2461 61 2610 email: [EMAIL PROTECTED] _______________________________________________ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
