On Sun, 2 Dec 2001 [EMAIL PROTECTED] wrote: > Hmmm. I've been fighting this fight, too. One problem is that if your diff > material isn't absolutely creamy smooth, you have to space it quite a ways > behind the neg to ensure that any graininess is entirely out of foucus. I > can't seem to find milk-white, smooth diff material available by itself. > ...<snip>... > One success i've had on a small scale is actually a piece of white shopping > bag plastic.
Based on your comments and success with whith shopping bag plastic, it might be worth checking out white Plexiglass. This is the same stuff used for making light boxes, and is readily available from plastic supply houses. Another possibility would be frosted drafting mylar. The frosted mylar is what Howard Bond has been using for his unsharp masking, and more recently for dodging and burning masks mounted just above the negative. In any case, heat is something to be concerned about. A piece of heat absorbing glass between the lamp and the diffuser may be in order? > By the way, all, the 4x5 SLR is almost done. Does anybody have any > suggestions for posting pictures? You can't post pictures to the mailing list. You CAN send them to me directly and I'll put them on the RMP cameramakers web site at <http://rmp.opusis.com> so that people can see them. - Wayde ([EMAIL PROTECTED]) ------------------------------------------------------ ISART 2002 International Symposium on Advanced Radio Technology http://www.its.bldrdoc.gov/meetings/art/index.html ------------------------------------------------------ _______________________________________________ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
