IRIX 11mm f4

The IRIX 11mm f/4 is an ultra-wide-angle prime for full-frame cameras, built for landscape, architecture, and astrophotography where an expansive field of view is essential. Three aspherical elements along with extra-low dispersion and high-refractive glass work together to keep distortion, chromatic aberration, and coma under control even toward the edges of the frame.

Its rugged construction includes weather sealing to handle dusty or damp shooting conditions outdoors, and a click/de-click aperture ring lets it switch between stepped clicks for stills and smooth, silent adjustment for video. A focus lock feature also helps hold critical focus once it's set, which is especially useful for long-exposure night and star work.