Nikon AF Fisheye Nikkor 16mm f/2.8 D Lens - a little gem for astrophotography!

Description

Capable of producing truly unique imagery, the
AF Fisheye-NIKKOR 16mm f/2.8D
from
Nikon
offers a distinct and creative look, characterized by noticeable distortion and a broad 180° angle of view. A 9.8" minimum focusing distance can be used to accentuate close-up subjects and the Close-Range Correction system helps to ensure consistent image quality throughout the entire focusing range. A Super Integrated Coating has been applied to individual elements, and helps to reduce flare and ghosting for improved contrast and color accuracy. Additionally, a built-in lens hood also cuts flare and offers some physical protection to the front element.
I used this primarily for night sky, and at only 3" long and 2.5" in diameter, it takes up no room in your bag.  Comes with front and rear caps and the CA-2 rear filter kit (being a true fisheye, it is next to impossible to front mount filters over the bulbous lens).  At nearly 00 new, save big and get this new-appearing example for half price!
Fisheye prime is designed for FX-format Nikon F-mount cameras, however can also be used with DX models where it provides a 24mm equivalent focal length.
Full-frame coverage, 180° angle of view produces creatively distorted imagery and is well suited for interiors, sports, and nature applications.
Bright f/2.8 maximum aperture is suitable for photographing in difficult lighting conditions.
Super Integrated Coating has been applied to individual elements to suppress internal reflections, flare, and ghosting for improved contrast and color accuracy when working in strong lighting conditions.
Close-Range Correction system helps to maintain consistent image quality throughout the entire focusing range, from the minimum focusing distance of 9.8" to infinity.
Autofocus system is compatible with select Nikon DSLRs that support D-type lenses, and offers quick and precise focusing performance.
Autofocus is not supported by DSLRs lacking an autofocus motor, such as the D3000-series, D5000-series, D40, D40X, and D60, where the lens may be used with manual focus only.
Built-in petal-shaped hood helps prevent lens flare and also protects the front lens element.
Four rear filters are included: L37C UV, A2 light amber, B2 light blue, and 056 orange. One filter must be in place at all times.