Quote Originally Posted by JPD View Post
Good suggestion. I have emailed and asked them about the hardness of the coatings. I do, however, believe they are hard. It's not the late 1930's anymore.
Well, I have received optics for a camera lens made & coated within the last year where the AR just wiped off. Hard coating was not specified on the drawings, for subsequent orders it was...
If you use a lab that coats eyeglasses it is a safe bet it will be hard coat though.