The Sigma 20mm F1.4 DG HSM Art is an interchangeable wide angle lens announced by Sigma Corporation on October 16, 2015.

Quick Facts Maker, Lens mount(s) ...

Sigma 20mm F1.4 DG HSM Art

Maker	Sigma
Lens mount(s)	Canon EF, Nikon F (FX), Sigma SA, Sony E
Technical data
Type	Prime
Focus drive	Ring-type ultrasonic
Close focus distance	0.30 metres (0.98 ft)
Max. magnification	0.14
Diaphragm blades	9
Construction	15 elements in 11 groups
Features
Manual focus override	Yes
Weather-sealing	No
Lens-based stabilization	No
Aperture ring	No
Physical
Max. length	130 millimetres (5.1 in)
Diameter	91 millimetres (3.6 in)
Weight	950 grams (2.09 lb)
History
Introduction	2015

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Much like the similar 24mm F1.4, it is designed for wide angle photography with shallow depth of field. At full aperture, it has similar focus depth to a 35mm at f/2.8.

• http://www.dpreview.com/products/sigma/lenses/sigma_20_1p4/specifications

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