Reviewed by 3 customers
Good product, it has a screw on mount and can go on the lense or on your filters. The filters themselves are square and slide in the holder. You can use 1 or 2 or 3 at a time or just take them out and leave the holder on your lense in case you need it again. You do have to hold the filter holder or readjust after focus, but filters are good. I broke a corner off the ND and it still works great. Just keep them clean and in a good case, they are delicate.
I have recently purchased a new slr camera and had to replace lost filters.
very easy to use just a little bulky to carry around