Sigma Has Announced An Incredibly Fast 20mm f/1.4 Full-Frame Lens

Sigma 20mm f1.4
Sigma has added yet another lens to their higher-end Art series, this time a wide angle full-frame 20mm that opens up to an f/1.4 aperture.

It's rare to find really wide angle full-frame still lenses even remotely this fast, so the fact that Sigma has gotten this to an f/1.4 (and under $1,000) is pretty amazing. Most 20mm lenses are around an f/2 or f/2.8, with Nikon making a particularly speedy 20mm f/1.8. There isn't a giant difference between f/1.4 and f/1.8, but the fact that all of the prime lenses in the Art series have consistent f1/.4 apertures is fantastic, and this one should fit nicely with the 24mm f/1.4, 35mm f/1.4, and 50mm f/1.4 lenses already in the series. This 20mm will come in Canon EF, Nikon F, and Sigma SA mounts. 

Here are the specs:

  • Comes in Canon EF, Nikon F, Sigma SA Mounts
  • Covers Full-Frame 35mm
  • Aperture Range: f/1.4 to f/16
  • Two FLD Elements and Five SLD Elements
  • Two Aspherical Elements
  • Super Multi-Layer Coating
  • Hyper Sonic AF Motor, Manual Override
  • Rounded 9-Blade Diaphragm
  • TSC Material, Brass Bayonet Mount
  • Minimum Focus Distance: 10.9" (27.69 cm)
  • Built-In Petal-Shaped Lens Hood
  • Compatible with Sigma USB Dock
  • Dimensions (DxL): Approx. 3.57 x 5.11" (90.7 x 129.8 mm)
  • Weight: 2.09 lb (950 g)
  • Availability: November 2015
  • Price: $900

While there are faster and wider lenses out there, they are mainly PL cinema lenses that only cover Super 35mm and cost more than your car. If this 20mm is anything like the others in the Art series (which we expect it will be), it's going to be on the sharper side. The only question will be distortion. Once you get this wide, keeping straight lines straight starts to become rather difficult, and that will likely be more of a deciding factor than speed at this wide of a focal length.

If Sigma completes the long end of this Art line, it would be interesting to see a cinema version with gears and smooth iris. At the moment there is really nothing that competes with the price/feature set of the Samyang/Rokinon cinema series, so hopefully other manufacturers will catch on and produce lenses that have all of the features filmmakers want, but won't completely break the bank — and deliver stellar image quality.     

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Your Comment


If I could have one wish it'd be for the 18-35 as a cinema lens. The whole art series would be cool, but that one lens would be a filmmakers dream.

October 17, 2015 at 7:35AM

Jonesy Jones

The only thing really *not cinema* about it is digital aperature (but if you're using a digital controller the point is moot). The zoom and focus are *really* smooth and tight. We use 'em for filming all the time. And the price cant be beat!

October 17, 2015 at 8:28AM, Edited October 17, 8:28AM


GL Optics offers a true cinema rehousing for the Sigma Art lenses, including a manual aperture and longer focus throw. It looks like the PCHood mod doesn't have a manual aperture or focus throw adjustment. The GL Optics markup is high, similar to the markup on a CP.2 or CN-E. or

October 18, 2015 at 11:44PM

Rich Brown
Director, Producer

Hmmmm this could be good.

October 17, 2015 at 9:38AM

Samu Amunét

Looks amazing, except for the lack of filter threads, so no screw-in ND filters, must use with a camera that has built-in ND or with a matte box. Considering this, I might get the 24mm instead, even though the extra width might be nice...

October 17, 2015 at 6:35PM