The Distagon T F/2.8 wide angle Fixed/Prime lens offers the user a focal length of 21 mm, a maximum aperture of f2.8 and a EF mount. It's designed to be used with D-SLR bodies, it has a metal body and its focus is manually adjustable. At a diameter of 8.7 cm weighs 720 grams. The lens supports all important operations such as the automatic exposure for shutter priority, aperture priority and program modes. Its dimensions are 3.43 x 3.43 x 4.29 inches and it weighs 1.32 pounds.