N MINT Tokina RMC 500mm f/8 Reflex Telephoto Mirror Lens Minolta SR MD MC JAPAN

The Tokina RMC 500mm f/8 is a catadioptric (mirror) telephoto lens offering a 500mm focal length in a compact, lightweight body compared to conventional telephoto lenses of equivalent reach. The RMC designation indicates Tokina's multi-coating applied to the optical elements. Rather than using a purely refractive optical system, the 500mm f/8 employs a folded mirror design that bounces light internally to achieve a long focal length within a short physical barrel. This results in a significantly more compact and lighter lens than a conventional 500mm telephoto, at the cost of a fixed aperture. Out-of-focus highlights rendered by mirror lenses produce a characteristic ring-shaped bokeh — a result of the central mirror obstruction. This is a well-known optical characteristic of all catadi.