G'day. I need some help choosing my a CPL.. as I understand, it will allow me to take shots with reduced glare..and more vivid colors. Is that correct? What lenses am I better of using it on? Nikon 18-55mm f/3.5-5.6 Mikon 55-200 mm f/4-5.6 Nikkor 50 mm 1.8 How does the CPL work? What allows it to block the glare? The way I understand it, if something I can make my picture look better by adding an addition to a lens, it will take something away.. is F stop loss the only thing that i shall lose? What kind of environments would I need to use the filter for most often? What are the good ones? I am shooting with d40 (hope to move to d300 soon).. and am seeing that there are some serious differences between the prices 50-1600$. what is so different between the filters? thank you in advance.