[rollei_list] Re: Filter identification question

Hi!

I hope someone can help me identify a Rollei Bay III filter that I have with
the letters I R on it. It is clear and has bay III fittings on both sides (male
on onme end, female on the other).  Should I assume this is an infra-red
filter?  How is it used and what effect would it have being used with black and
white film?

Many thanks, Jerry F.  



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