ニャンのすけ 4 I bought the 72mm and 52mm to try out with some landscape photography but I haven't had a lot of opportunity to use it. One time I did it was pretty useful, I was able to reduce the glare from the water and make the reflections of the trees in this case pop more. Edit: I did some further testing and found it useful with improving the colour balance of images and makes colour correction in post processing a bit easier for myself. Also the addition of ND 8 filter allowed for some smoothing out of flowing water. They were taken in bright daylight, so couldn't get the best results (also my settings were a bit off).It's pretty thin, which while nice can make it difficult to unscrew off the lens at times. While thin it is wide and I can't always use my lens hood with it.For the price when i got it, it is a decent cpl filter.