Hello, I noticed that Rick Dingus wrote the following: I tried to modify a 4 x 5 color head that fits on my Durst 5 X 7 enlarger so it will cover at least 4 X 6 inches (I'm trying to print 6 X 12 negatives full frame--the 4 X 5 didn't quite cover). But now, even though I included extra diffusing plexiglass in the center, it is nearly a full stop brighter in the center than on the edges. Any suggestions for even illumination tricks? I don't know much about the construction of color heads. However, I do recall from reading instructions for the Elwood line of 5x7 and 8x10 enlargers that the physical size of the light bulb is important for preventing light falloff at the edges and corners! This was a surprise to me, but it makes sense. You have a curved dome and a bulb emitting light from a curved surface, so it's a problem of geometry. Perhaps a different size bulb, or different bulb placement would solve the problem. Hope this helps. --Michael Hendrickson [EMAIL PROTECTED] _______________________________________________ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
