For best results
To make most out of the Circular Polarizing filter, use it with your camera to take photos when the sun is either overhead or behind you and close to the horizon.

When not to use this filter?
Do not use it with stitched panoramic photos. The polarization from each panel may turn out different.

What size to choose?
It actually depends on the diameter of your lens. You can get one the same size as your lens but if you are planning to use a lens with a larger diameter, then go for the bigger one and buy an adaptor so that you can use your filter with your smaller lens.

Should I settle for a dirt cheap filter?
Buy filters from brands that are known to produce top-notch filters. Don’t settle for less or else, the quality of your images will most likely suffer. Go with Hoya, Kenko or B+W.

Buy a Circular Polarizing Filter here!