I bought this ND filter to try to sniff items, in the long exposure on the day. The results are very impressive for me as an amateur photographer with my Nikon D3100. The filter can unscrew to absolute darkness down and thus expose longer than 30 seconds.. Clouds blurred very atmospheric, running water can be photographed very soft and people in public places to disappear as if by magic out of the picture. Sharpness and colors are very well reproduced. For less than 10, - a category Accessories! It's crazy fun to experiment with it.