Nikon DK-16 Rubber Eyecup

The DK-16 Rubber Eyecup from Nikon is designed as a viewfinder accessory for select Nikon DSLR and SLR cameras. Its purpose is to obstruct stray light that might impede the focusing and composition process by infiltrating the space between the camera's viewfinder and the user's eye. Additionally, the cushioning it affords enhances comfort during use and safeguards the surfaces of eyeglasses or sunglasses if worn while framing an image through the camera's viewfinder.