Ok. I've got to point a couple of things out here. None of the filters that I made my statement on are on this list, including the one I use. Secondly, why in this test, are they testing these things in the dark, like the one I just happened to look at the "test" results? You typically try to use a Polarizer to take advantage of the Doppler effect to some degree. What this means is you always want to shoot your nice sunny landscape with the sun behind you or somewhat beyond perpendicular to you scenery. This is because as light waves are traveling away from you, they tend to produce more rich blues and greens as opposed to reds like when you shoot into the sun or less than perpendicular. This effect is magnified with a polarizer and the effect is proportional to the degree that the wavelengths of light are heading towards your scenery that you’re trying to capture in a crazy but true way. Please tell me if you know differently, I’ve been so intrigued about always achieving the richest color schemes in my landscape Photography and I frown upon anything but bright sun and/or including big puffy cumulous clouds. Also, how can any test be conclusive if you use different diameter polarizers through you different filters which would tend to pop the question to me, "Where they even using the same lenses?" My Pentax DA* 16-50 2.8 is typically just not going to have the ability to produce as rich and blue of a sky as say my Pentax 12-24 f4. Please, just simplify this and just show us some pictures as opposed to numbers that we have a hard time believing when I can point out flaws in the test right off the bat. The guy just wants a good filter. Show him some examples along with the filter that you used. I'll try to take a couple of pictures with everything the same to show you the difference between a $70 Promaster CPL and my $100 Promaster Digital CPL that I use on my Pentax K-5 with the 12-24mm lens. I was hesitant to use the Standard one on my 12-24 that I take alongside with my 16-50 with the Digital one on all my backpacking trips for two reasons. One, the $70 one can't accept a lens cap. Two, "It's not nearly as good as the $100 Digital one that also allows for the lens cap to be used.”
