Re: polarizing filters with b&w infrared

[tom@xxxxxxxxxxxxxxxxxxxxxx (Tom Benedict)]

Joe wrote:
>Tom--The point about polarizers and b&w infrared film is that they are not
>required to produce black skies and white vegetation. The red and infrared
>filters accomplish this quite well by blocking blue light, which a polarizer
>does not block. Optimum effects are achieved with these filters, ( including
>haze penetration ) and a polarizer will not improve on these results. This is
>discussed in a chapter on filters in Kodak's Applied Infrared Photography
>book and from personal experimentation.
>                                                               joe

Ok.  That's fine.  I just get irked when people say you can't polarize
IR light, and then correct me when I try to say that you can.  From a
photographic standpoint I'd probably never do it (because, as you
said, there's no point in doing so.)  From a technical standpoint,
though, it's more than possible.  It's done all the time.

Tom

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Topic No. 7