Fantasea 5178 46mm Red Filter For Fantasea new generation Nikon Coolpix housings and Olympus housings Fits over the housing's port and can be installed and removed during the course of the dive Wet filter enhances the quality of both still and video images when not using an artificial light source Filter is mounted on the housing's lens port and held in place by screw thread Newer versions of the FL-10 and FL-11 housings which feature a threaded lens port, as well as all FL-12, FL-14, FL-15, FS-200, FS-500 and FP-5000 housings.