This Neoprene Light Blocking Mask from Aquatica is designed for use on fisheye lenses in Aquatica underwater housings. When the camera's built-in flash is used to trigger external strobes, this mask around the lens will block the light from the flash, thus preventing internal reflection off the front element of your dome lens port.
Compatible Lenses
Works with most fisheye lenses, including:Nikon AF NIKKOR 10.5mm f/2.8G ED DX Nikon AF NIKKOR 16mm f/2.8D Sigma 10mm f/2.8 EX DC HSM Sigma 15mm F/2.8 EX DG Diagonal Sigma 8mm F/3.5 EX DG Circular Sigma 4.5mm F/2.8 EX DC HSM Circular Tokina AF 10-17mm f/3.5-4.5 AT-X DX Canon EF 15mm f/2.8