Stefan Gerris wrote: > Yes, but it is not a circular polariser in the physical sense: It > doesn't filter out all linear polarised light and let the circular > polarised light pass. I couldn't think of a photographic use for such > a filter anyway...
I think such a thing can't exists. As described in the previous mail, circularly polarised light can be seen as the sum of two linearly polarised beams. But this also works the other way around: linearly polarised light can be seen as the sum of two circularly polarised beams (one rotating left, the other right). The two kinds of polarisation are combinations of each other, and therefore a filter that blocks all linearly polarised light blocks also all circularly polarised light. (Probably cheaper to use a lens cap on your EOS lenses ;-) Regards, Peter Wagemans * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
