Sigma Adds 20mm f/2 DG DN Contemporary to I-Series Lenses


Sigma has announced the 20mm f/2 DG DN Contemporary Lens for full-frame L and Sony E-Mount mirrorless cameras. The widest I-series lens to date, this compact prime shares the f/2 aperture and distinct craftsmanship of its predecessors while expanding coverage to include landscape, cityscape, and astrophotography. Wide, bright, and light, it is equally useful as a video lens, and particularly well suited for handheld vlogging and livestreaming.

20mm f/2 DG DN Contemporary Lens
20mm f/2 DG DN Contemporary Lens

Optically, the new lens consists of 13 elements arranged in 11 groups, including one F Low Dispersion (FLD), one Special Low Dispersion (SLD), and three aspherical elements. Distortion is minimal, imaging is sharp, and bokeh is smooth. On an APS-C format camera, 20mm turns into a 30mm-equivalent focal length. You can get as close as 8.7 inches from your subject for creative close-ups, a 1:6.7 magnification ratio.

The seventh of Sigma’s I-series of lenses, the new prime shares a number of stylish and functional design features with previous models, including all-metal construction, a manual aperture ring, and knurled controls. Similarly, it measures slightly less than 3 inches in either direction and weighs 13.1 ounces, making it an easy travel companion whether shooting stills or video. A metal lens hood and magnetic lens cap are included, adding yet another layer of functional elegance. Its mount is dust and splash resistant, while its front accepts 62mm filters.

The L-Mount version of the lens offers the ability to choose between Linear and Non-linear manual focusing, an option that future firmware updates may bring to existing I-series L-Mount lenses.

Have you used Sigma’s I-series lenses? Is there a place for the latest entry in your camera bag? Share your thoughts in the Comments section, below!



Unfortunately, the Sigma 24mm f/2 DG DN Contemporary Lens would be a prime lens, which doesn't offer zoom capability. There is the Sigma 24-70mm f/2.8 DG DN Art Lens for Leica L, BH #SI247028L which does offer zoom capability.

Does this lens require the separate coupler for updating firmware? I purchased a Sigma Canon EF to Sony E mount converter, only to discover after the fact that it requires a separate Sigma coupling device, $58, in order to update firmware. It seems to me this should have been made known to me by B&H at the time I purchased the EF to Sony E converter, though it was not. 

Unfortunately, as of the date/time of this reply, Sigma does not manufacture a Sigma USB Dock designed for use with the Sony E lens mount. I do not see an option to update the firmware of the Sigma 20mm f/2 DG DN Contemporary Lens for Sony E at this time. I am not sure if this will change in the future, but you may be able to send your lens to Sigma directly for firmware updates (if necessary).
If you are stating that you have a Sigma EF mount lens designed for use on the Canon EF lens mount (with which you use the Sigma MC-11 Mount Converter/Lens Adapter) and you need to update your lens' firmware, the Sigma USB Dock for Canon EF-Mount Lenses, B&H # SIUSBDC • MFR # 878101, would be the correct USB dock to update your lens' firmware.  That being said, the Sigma 20mm f/2 DG DN Contemporary Lens for which this article is titled is not available for the Canon EF lens mount, and as such, would not work on the aforementioned Sigma USB Dock for Canon EF-Mount Lenses.