Finally able to find a rear 43mm pol for the Tamron 400/4. (10 buck
snipe) It is a single piece of glass???? Every other pol, linear or
otherwise, always had two. Must be a good reason to add the extra
glass. I do have some pol film to put on the T28 or T32 for cross pol
purposes but perhaps that is a suboptimal way to construct them. I
could see that perhaps a quarter wave retarder might be in the second
glass for a circular flavor but it struck me as very odd construction.
It is a bit of a pain to use with no way to rotate it externally unlike
the newer Tam 300/2.8 AF. Any ideas of the advantages of the usual two
glass construction?
Thanks,
Mike
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