There is really very little choice in strong screw-in (which is what you need to prevent lights leaks) ND filters - B+W six stops or ten stops. You can also get a Hoya X400 which is nine stops, special order only and even more expensive (but probably better because it's coated).
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.