Have I bought this polarizing filter for my 600D with the kit lens 18-55m. For the price I can not complain. Works great and helps especially on holiday if you eg towers, Tall houses or something photographed. The sky gets a rich blue and shines almost. However, the effect decreases when keeping the camera horizontally. Also reflections of glass to be filtered out only at a certain angle to the glass reliably. At sea, the filter is also good to use, as the sea shines less and Blue is.
+ Amazing low price, therefore also usable as a lens protector + Good durability, looks very solid + Good handling, to touch the turn and turns very soft, no scratch or the like + Image is not blurred with Filters
-Schluckt Really a lot of light, about 1 1/2 to 2 EV, but there also is not bad.
Conclusion: For the holidays, the filter is perfect, the things want to take pictures behind glass for museum visitors or so advisable for the but high light loss.