Capture detailed close-up shots of fish, coral, and other sea life at depths up to 328' with this Sea & Sea 30119 DX Macro Port 87 for select Canon and Nikon lenses. It fits the Canon 100mm f/2.8, Nikon Micro NIKKOR 105mm f/2.8G VR, and Nikon DX Micro NIKKOR 85mm f/3.5G VR lenses. The port mounts onto Sea & Sea MDX Underwater Housings for DSLR cameras. The port has a flat front element made of glass, which features an anti-reflection coating on the inner surface. It also has a body made of an aluminum alloy that is anodized for resistance to corrosion. An M67 screw mount with a 67mm thread diameter enables the attachment of optional filters and conversion lenses.