I had 3 pair of lenses come back yesterday. All 3 were FT-28 CR-39, two were hard coated, one was not. No A/R. Anyway...
so the lenses checked out fine, no visible distortions, scratches, or marks in the lenses. UNTIL I sprayed to clean... and all 3, both lenses, had a very visible blocking pad mark! Again, no visible distortions or anything until sprayed. It wasn't residue -- tried getting it off with alcohol, no go.
What on earth is going on there? Something wrong with their edger or the person running it? What would cause that? I called and they said send them back and they would look into it, so I did, but I don't know much about the lab side of things, so I'm curious as to what would cause this. Thanks!
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