Expensive, but of very high quality. With this is attached to your Lens it s very difficult to focus, well impossible really, you have to focus with the filter off first, then reattach, a bit of a fiddle, and the use of a good tripod is necessary, or you'll move out of frame your subject. Take a light reading then set you exposure manually, a iPhone app/Android app will come in handy on your smart phone to work out your exposure time, you could also download a exposure chart too. Some experimenting and patients will reward you. you could try a cheaper make to practice first, then decide on the B&W? Why not go to [...] and search for ND110, you will see some stunning Photos taken with this Filter.