Manual focus mirror telephoto lens for Nikon F-mount cameras.
The Nikon 500mm f/8 Reflex is a catadioptric (mirror/reflex) telephoto lens that uses a combination of mirrors and lens elements rather than a purely refractive design. This catadioptric approach enables a compact, lightweight form factor for a 500mm telephoto. Nikon produced several reflex designs; the f/8 variant is the more accessible enthusiast-tier option.
500mm focal length, f/8 fixed aperture (catadioptric design — no aperture ring, no aperture adjustment), Nikon F mount, compact and lightweight relative to conventional 500mm telephotos, 39mm drop-in filter system, manual focus.
The fixed f/8 aperture is the defining practical constraint: exposure control is entirely by ISO and shutter speed. Out-of-focus backgrounds render as distinctive 'donut-shaped' bokeh due to the circular mirror obstruction — visible in any out-of-focus catchlights or specular highlights. The compact form factor is the compensating advantage for travel where a conventional refractive 500mm is impractical. No autofocus on any Nikon reflex lens; stop-down metering required on some F-mount bodies.
Inspect the front convex mirror surface for scratches — this element is more exposed than a recessed front element. Check the drop-in filter slot and any included filters. Test focus helicoid for smooth operation throughout the range. Verify Nikon F-mount coupling. Internal mirror and element cleaning is a specialist operation — note any visible haze before purchase.