Sigma’s ultra-fast 20mm f/1.4 Art lens is a perfect piece for landscape and astrophotographers

by Gannon Burgett

posted Friday, October 16, 2015 at 12:00 AM EST

Sigma has officially unveiled the 20mm f/1.4 DG HSM Art, the fourth lens in their full-frame ’Art’ lineup.

Similar to its 24mm, 35mm and 50mm siblings in both aesthetics and overall build, the 20mm f/1.4 takes a slightly wider look at the world, making it a wonderful option for landscapes, architecture and even astrophotography, considering its f/1.4 aperture makes it perfect for those low-light situations. Like the Global Vision-designed lenses in Sigma’s lineup, the 20mm f/1.4 is designed with full-frame cameras in mind, but is also fully compatible with APS-C cameras, where it’s roughly a 32mm equivalent.

The optical construction of the 20mm f/1.4 utilizes 15 elements in 11 groups and includes a double-sided aspherical element, two “F” Low Dispersion (FLD) elements and five Special Low Dispersion (SLD) elements to reduce chromatic aberration, especially at the edges of the frame. Bokeh is kept smooth with a nine blade aperture diaphragm.



Like its 24mm sibling, the 20mm f/1.4 includes an in-lens HSM autofocus motor that includes full-time manual focus override of autofocus.

Sigma notes the 20mm f/1.4 will line right up with other ’Art’ lenses, ensuring it’ll be a treat to get our hands on it for tests in our lab and Field Tests.

The Sigma 20mm f/1.4 DG HSM Art will be available in Canon, Nikon and Sigma mounts. It’s set to ship in November with a retail price of US$899.