Foto&Tech Rubber Eyecup for Glasses Replaces Nikon Eyecup DK19 is specially designed for the eyeglass wearer. It is a replacement eyepiece for select Nikon SLR and DSLR cameras. The eyepiece provides a comfortable, round eyecup with which to utilize the camera's viewfinder and blocks unwanted light from entering the viewfinder. Made from soft and durable rubber, it also prevents scratching and damage to eyeglasses. It mounts easily and securely to the viewfinder and is compatible with select Nikon cameras. Compatible With: Nikon Df, D2H, D2Hs, D2X, D2Xs, D3, D3S, D3X, D4, D4s, D700, D800, D800E, F6. Specifications: Diameter: 1.75 inch, Product Weight: 0.2 ounce /1 pack.