content: I bought this filter as part of a package with a UV and a warming filter through Amazon. They're all Tiffen thought the Polarizer is what I really wanted.In use I can see difference in colour saturation especially in blue skies which actuall gained a richer contrast from the white clouds. On the downside, if you're using a wide-angle lens, expect to get some vignetting on the corners. That turned out to be just annoying when reviewing my shots. I also noticed an increase in noise on my shots but I cant say for sure just yet if this was due to the filter.Im an amateur so I guess I cant complain about what I got for this price range. But in hoping to develop in the field, I think next time I'll put in the extra to get a better more professional filter. Be sure to try shooting B&W; with the polarizer, you'll enjoy the results.