I have long sought a neutral density filter, which is not so much ND3,0 my purse belastet.Mit the Delamax 58mm neutral density filter I have found such. He came with a quiver to protect against scratches when not in use. It has a metal frame that makes starting and tighten slightly. I use this filter with an adapter for another lens with a different thread size. Here, too, there are no problems when it is screwed. The neutral density filter allows it to represent flowing water as if it has a milky consistency. Also crowded places are represented almost deserted by the long exposure. Do not regret this purchase.