The Zeiss Distagon T 21 mm for Nikon is a manual-focus superwide professional lens known for its performance and exceptional color control. The Distagon T ZF II weighs no less than 21 ounces. The Distagon T ZF II lens measures 3.4 inches by 4.3 inches. The aperture of this Zeiss super-wide lens ranges from f/2.8 to f/22, and the minimum focusing distance is 8.7 inches. The Zeiss Distagon T 21 mm for Nikon features the renowned Carl Zeiss T antireflection coating that promotes outstanding results in daylight as well as conditions with low light. A mechanical lock on the aperture ring of the Zeiss Distagon T 21 mm for Nikon allows the user to lock at the lowest setting and prevents accidental adjustment while photographing. Other features of the Distagon T 21 mm f/2.8 include an F bayonet lens mount, a maximum reproduction ratio of 1:5 and an angle of view of 90 degrees. This Zeiss super-wide lens is a full-frame that is suitable for landscape and portrait photography.