Thanks for the interesting article on your technique for working with a Nikon scanner. I also see, but have not yet fully explored, that you have written extensively about color scanning issues. I have a simple question: is anti Newton glass different from non glare glass? I ask because I have half a case of gallery grade non glare glass left over from when I mounted an exhibit in the local library. Thank you for your time in responding.
It depends. The goals overlap but are not entirely the same. Both types of glass are trying to break up the smooth surface of the glass but with different goals in mind. The antiglare gallery glass aims to avoid reflections by making the surface irregular with irregularities that will not typically degrade the optical quality of the glass to a typical gallery viewer standing at some distance from it. The anti-Newton glass is trying to avoid the microscopic surface interaction that leads to Newton rings whilst making the irregularities as small as possible so as not to degrade the optical quality of the glass at a much higher level of detail and magnification.
In other words, it depends how “coarse” the gallery glass is. Probably the best test is to simply try it. If you find degraded image quality or strange artifacts in smooth film areas like blue skies then it may not be suitable. A company called Focal Point make some very good anti-Newton glass to precise dimensions for various popular film scanners. They are not very expensive.
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