Bob, I think the difference between your drum scanners and the Epson might be that you were probably using a mounting fluid with the drums. You can avoid Newton rings with the Epson flatbeds by using a mounting fluid -- messier but effective. With Tri-X, I rarely have a problem with Newton rings unless the negative has large areas of clear film. With some other films with thinner emulsions, like Tech Pan, Newton rings are a constant struggle for me if scanning them directly on the glass without mounting fluid. Sanders On Mar 23, 2011, at 1:07 AM, Bob Smith wrote: >> >> From: Bob Smith <notraces@xxxxxxxxx> >> Subject: [rollei_list] Rodinal, TMax, scanning >> Date: Mon, 21 Mar 2011 09:11:28 -0400 >> >> I read this from Sanders this morning and I wanted a little clarification - >> I could be misinterpreting the thought. I've never heard of underexposed >> negs causing Newton Rings. Am I understanding this correctly? I spent many >> years selling both high-end drum scanners (Hell Graphics / Linotype / Scitex >> - along with flatbed scanners from Iris / AGFA, etc) - and I never recall >> hearing Newton rings can be caused by underexposed negatives. Now I'm >> curious and just looking for some clarification. >> >> Thanks. >> >> Bob Smith >> >> "I am curious to hear more about your experience in scanning >> underexposed film directly on the glass. My experience is that it >> is a nightmare, because of the Newton rings caused by the bare >> substrate on the glass (a problem I rarely encounter with a lot >> of developed emulsion in a well-exposed negative). How do >> you avoid this problem with underexposed negatives on the glass?" >> ------------------------------ --- Rollei List - Post to rollei_list@xxxxxxxxxxxxx - Subscribe at rollei_list-request@xxxxxxxxxxxxx with 'subscribe' in the subject field OR by logging into www.freelists.org - Unsubscribe at rollei_list-request@xxxxxxxxxxxxx with 'unsubscribe' in the subject field OR by logging into www.freelists.org - Online, searchable archives are available at //www.freelists.org/archives/rollei_list