Quote:
Originally Posted by Star Hunter
I'm going to build a folded refractor for my 19th century Wray (London) 6" F15 lens. The parts I need are 4" and 3" dia. 1/20 wave optical flats - round or square. Any one got any pointers on where I can suss out these items?
cheers,
James
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Maybe edmund optics? Optical flats are quite expensive.