... Implementing bad. I can not expect miracles in the price, it was clear! But I think 150 B + W polarizing filters have almost no longer get down, made me really angry. The screw thread is low-grade and caught very easily. Took me two hours cost on holiday my polarizing filter with a penknife and vieeeel patience back to pulen down! Definitely not advise ... have landed in the bin! Same goes for the review StepUp rings!