Roberts and UsedPhotoPro will be closed Monday December 25th. Online orders may still be placed but won't process to ship until we open again at 9am December 26th.
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 Polarising) filters can sometimes interact with these items to give unpredictable exposure or focusing. So we recommend that you choose a PL-CIR filter unless you have a manual focus camera which has no beam splitter.