Anti-Newton Glass

[Ole]

A very good anti-reflex coating should also work as AN-device. After all, the rings are formed by reflection between two not-quite-touching surfaces. An anti-reflex coating half a wavelength thick should do the trick.

[Nacio Jan Brown]

I replaced the top piece of glass in my negative carrier with something called "Denglass" (sp?) that I got from a picture framer. I forget where I got this tip. It has been 100% effective. Newton rings show up as a problem where the film base side of the negative is in close proximity to the glass, as described above. njb