This is the first Fisheye Nikkor lens that has adopted the automatic aperture diaphragm (See earlier Fisheye-Nikkor 8mm f8.0). The lens speed of f/2.8 is the fastest in the array of Fisheye Nikkor lenses. The most significant design of the lens when compared with older versions is it obviates the need for locking up the mirror and use of special accessory finders as with many older fisheye Nikkor lenses. This is the brightest Fisheye lens and is provided with the automatic diaphragm coupled to the exposure meter. Thus, viewing and focusing can be done on the focusing screen with the f/2.8 brightness. Another significant difference is the ability to focus with the new lens design where the mechanism provides graduation both in meters and feet up to 0.3m and 1 ft. Older versions of Auto Fisheye-Nikkor lenses have fixed focus design.
The automatic diaphragm stops down to f/22. There are five built-in filters on a rotating turret (see picture below) which has added a layer of flexibility to the lens functionality. It is a lens combining some good elements in its overall compactness, its fast lens speed, automatic diaphragm and through-the-lens viewing capability, as well as the unique fisheye pictorial qualities it delivers.
Focal length: 8mm
Maximum aperture: 1:2.8; Lens construction: 10 elements in 8 groups
Picture angle: 180°Meter coupling prong: Integrated (fully open exposure metering)
Distance scale: Graduated both in meters and feet up to 0.3m and 1 ft
Aperture scale: f/2.8 – f/22
Aperture diaphragm: Manual
Attachment size: 120mm (P=1.00)
Filter: Built-in, L1 A, Y48, Y52, 056 & R60