RE: [Demo notebook] Collector’s comparison desk: dimensions, fit and documented differences · RWI-20966
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November 12, 2023 at 2:45 pm
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Case 21 — Crystal reflections: why a dark patch is not a coating test
A dark area appears at an oblique angle in a single photograph. Does that establish a coating difference?
Exercise RWI-20966/21: address this question within its stated limits.