Peter Wagemans wrote: > > Physically speaking there is no circular polarisation envolved > > whatsoever! > The light behind the circular polariser is circularly polarised. 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 love to figure out how stuff works. > In the past I've submitted some comments on circular polarisers > to the list... Thanks, it's clear now. I like the theoretical explanation, it provides more detail on what I understood already from the Cokin website. > > this polariser on wider angle zooms > The polarisation of the sky depends on the angle with the > sun. Thus you often get uneven brightness in the sky if you > use polarisers with wide angle shots. This effect can ruin photos, I know... With a horizontal viewing angle of 70'+ it's impossible to have the same polarisation effect all over the composition. There are however compositions in which a wide angle with polariser can have wonderful effects. Especially if you can manage to mask the bright part of the sky by say a tree... Cheers, Stefan -------------------------------------------------------------------------------- * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
