Negative Positive
Title: Semi-opaque to UV Light
Review: I decided to try the filter in an old Beckman UV-VIS spectrophotometer, and replicate optical transmittance results in Poland. Sure enough, Tiffen and window glass appear to be optically related in transmittance of long-wave UV. Frankly, I've alays had the impression that Tiffen filtered images were less clear than B&W, and this kind of study may well explain the difference. Here's a link to the original study results [...]
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