Ingmar wrote:
Is it not possible that the UV rays and time (age) may change the very thin
layers of any coating - MC or CS?
No, they are likely to be pretty stable. Organics such as colored dyes change
greatly with exposure to light, but the sorts of materials used for optical
coatings would not.
As regards the comments of the Hoya representative, see my email from the other
day regarding multicoating design.
Chris
Malvern
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