The Irix 11mm f4 is an ultrawide, rectilinear corrected lens for Nikon F mount. Manual focus, but it's 11mm, so you're probably gonna be fine. This is a unique, high quality lens in excellent condition, designed to provide a corrected ultrawide angle image- not fisheye. This lens is the higher-spec "Blackstone" model with the metal body. In excellent condition, with clean glass and good function. Includes front and rear caps, plus a form-fitted case.