The 500mm f/8 Mirror is an ultra-telephoto lens designed for Nikon F mount cameras. The mirror lens has a rugged build and exceptional image quality. This mirror lens combines reflecting mirrors with lenses for a combination that allows telephotos to be lighter and more compact than conventional lenses. The effect on the image is ring blur - great for portrait work. The beauty is heightened even more when lighting is effectively used in shooting, resulting in photographs with overwhelming emotive power. Characteristics that make this lens a true classic. The use of rear-insertion type filters enable rapid secure filter changes. The barrel's rugged ZEN finish helps it withstand hard outdoor use.