Compact Nikon 500mm mirror telephoto with fixed f/8 and distinctive doughnut bokeh.
The Nikon 500mm f/8 Reflex-Nikkor is a catadioptric mirror telephoto lens for Nikon F mount that uses mirrors to fold the optical path, achieving 500mm reach in a dramatically compact barrel. The fixed f/8 aperture cannot be adjusted, limiting exposure control to shutter speed and ISO only.
The mirror design produces the distinctive doughnut-shaped bokeh in out-of-focus highlights that characterises all catadioptric lenses. Image quality is decent with respectable sharpness for a mirror lens of this type. The compact dimensions and relatively light weight make this the most portable 500mm option for the Nikon system.
Build quality is good with Nikon's characteristic quality construction. The lens includes an integrated tripod mount essential at 500mm. The fixed f/8 aperture requires bright conditions or high ISO for adequate shutter speeds. The 500mm focal length works on both FX and DX bodies.
On the used market, the Nikon 500mm f/8 Reflex offers affordable 500mm reach in a compact package. For Nikon shooters wanting to experiment with super-telephoto photography at minimal investment and size, it provides functional 500mm reach with the distinctive mirror lens aesthetic.