The Nikon DK-17 Eyepiece is a replacement eyepiece for select Nikon SLR and DSLR cameras. This eyepiece provides a comfortable surface for the area around your eye while framing a subject through the camera's viewfinder. It also serves to block unwanted and potentially distracting light from entering the viewfinder. Made from soft and durable rubber, the surface of the DK-17 Eyepiece prevents scratching and damage to eyeglasses. It mounts easily and securely to the viewfinder and is compatible with select Nikon cameras.