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04-17-2013, 08:09 PM   #16
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QuoteOriginally posted by calculator01 Quote
You nailed it, the ND is a B+W F-Pro, awesome brass and the polarizer is the B+W Slim, 5mm of aluminum. I guess one does not have to be a metallurgist to figure out why they got stuck
Looks like it. Different metals expanding and contracting at different rates.

And you mentioned the attempt at cooling and heating them. It is often difficult to reproduce the exact conditions at the time of assembly.

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