Archived posting to the Leica Users Group, 2005/12/20
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Possible Newton's Rings solution: Back in the dark ages of making color separations, I used a glass carrier on 35mm negs. To prevent the rings, I kept a squeeze bottle (like they put catsup or mustard in at the burger stand) half filled with corn starch. Shake it lightly and give it a light puff upward toward the transparency. The corn starch was never visible, but gave enough stand off from the glass to prevent the rings. This was printing through 100-line screens, so I'm not sure that the technique would work well for scanning. Might be worth a shot. Ric Carter http://gallery.leica-users.org/Passing-Fancies On Dec 20, 2005, at 8:28 AM, Craig Zeni wrote: >> >> I have much better luck with color negative film (lower contrast). On >> the other hand, with both color negatives and transparencies I >> usually >> get problems with Newton rings. I suppose the dedicated film holder >> which holds the film slightly off the glass, would help, with >> concommitant degradation in sharpness if your scanner lens focuses at >> the plane of the glass.