Received a t3i as a gift and wanted to get some filters to play around with it and this is one I had heard about. A lot of websites on filters are for going pro camera folks, while I wanted some info on just amateur and regular photos, as I'm not a pro, never will be. I'll leave that to the actual experts. I wanted this filter to improve family photos and vacation photos, so I'll leave a small blurb about what I found out the filter does. Anyone, feel free to correct me!I bought the Tiffen as I had read the Tiffen and Cokin filters were the best, and because of other reviews. It is a glass filter that screws in to a 58mm lens end. Others have info on how you can find out if this one will fit yours. I'm sure you can buy it in whatever the right size is for you.The polarized filter is for blocking reflected light from glass and bodies of water (lakes, ponds, streams, puddles). It can also help to darken the sky in pictures, while not affecting other parts of the picture too much. It does not darken the entire scene, just aspects of it by blocking reflected light. You can control how well it does this by rotating the filter, which is good because if you block out too much light a small puddle can look like a piece of glass on the land, and lose the effect.

Excelente product, light, high quality on pictures and video!!!Great idea include 2 batteriesVery happy to buy it, worth its price!!!

Has every attachment you will need for an action camera