Slim Frame
These excellent quality slim filters (4.68mm) will help to reduce the chance of vignetting on wide angle lenses, and this Slim Frame filter is providing both-side thread, so you can attach other accessories on it such as your lens cap.
How To Select The Correct Polarizing Filter:
Many of today's cameras use semi-silvered mirrors or prisms to split the light entering the viewfinder in order to calculate exposure and focusing distance. PL(Linear polarizing) filters can sometimes interact with these items to give unpredictable exposure or focusing. So we recommend that you choose a CPL filter unless you have a manual focus camera which has no beam splitter.