![]() It features an aperture range of f/1.4 through f/16 via an 11-bladed diaphragm. The optic is constructed of 17 elements in 14 groups including two FLD, one SLD, and four aspherical lenses. The aperture ring can also be de-clicked. It also features a configurable AFL switch and an aperture ring lock switch. The 20mm f/1.4 is also compatible with Sony’s AF assist function (E-mount only) as well as lens aberration correction found on select cameras. The lens weighs 635 grams (22.4 ounces), has a minimum focusing distance of 9.1 inches, is dust and splash-resistant, and is compatible with Sigma’s USB dock. It features an aperture range from f/1.4 through f/16 via an 11-bladed diaphragm. It is constructed of 17 elements in 15 groups, two of which are SLD elements and three are aspherical elements. Sigma says it is the first and only lens of this specification that is available for full-frame prime lenses that has been specifically designed for mirrorless, but does join its 20mm f/1.4 DG HSM Art in speed and focal length. The 20mm f/1.4 DG DN Art is a full-frame, wide-angle prime lens designed exclusively for mirrorless cameras. The World’s First 20mm f/1.4 Lens Designed Exclusively for Mirrorless ![]()
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