Extremely rare Nikon orthographic fisheye at 10mm, unique projection type among the rarest Nikkor lenses in existence.
The Nikon Nikkor 10mm f/5.6 OP Fisheye is an extremely rare orthographic projection fisheye lens from 1968 that produces a full 180-degree circular image within the 35mm frame. The OP designation indicates orthographic projection — a rare projection type that compresses the edges of the image more than standard equidistant fisheyes.
The orthographic projection creates a circular image with distinctive compression characteristics that differ from conventional equidistant and equisolid fisheye projections. The 180-degree coverage captures everything in a hemisphere in front of the lens in a single circular frame.
Build quality is early professional Nikon with substantial construction and the Pre-AI mount. The lens is one of the most specialised Nikkor optics ever produced, designed for scientific, meteorological, and artistic applications requiring the unique orthographic projection.
The Nikkor 10mm f/5.6 OP Fisheye is one of the rarest Nikkor lenses in existence, commanding extraordinary collector prices. The unique orthographic projection and extreme rarity make it a museum-grade collectible that represents the most specialised end of Nikon's optical engineering.