This thread is reminding me of a problem I’d like to solve. A neat
old medium format camera (a “Warner”, one of Jack Warner’s failures)
has lost some of its prism mirrored coating so it has big black
blotches directly in the middle where I used to focus it. This is
almost identical to metal coated facets on these clear sapphires. I
like it for quality 2"x2" negatives that enlarge better than 35mm. I
used it for special jewelry shots back when we were both younger, and
I hate to give up on it. Does anyone know about re-silvering in this
list? Thanks, Alan Heugh