The f/1.4 series represents the Sigma ART line, which pursues the highest optical performance and rich expression. This lens offers photographers overwhelming optical performance and unlimited potential for ultra wide-angle creativity at a compact physical size. The exceptional f/1.4 brightness and the breathtaking sharpness across the entire image even at maximum aperture make this lens the ultimate choice for astrophotography. In nightly darkness and focused to infinity, the Sigma ART 20mm f/1.4 DG DN captures stars in the sky as clear, precise pinpoints of light. State-of-the-art optical design and the large, high-precision double-sided aspheric glass front element made it possible to add a front filter thread without any compromises regarding optical performance or size. The addition of other invaluable features such as a rear filter holder and a variety of useful switches further increases the creative possibilities and easy usability of the lens. Its incredible sharpness and very bright aperture, coupled with the compact body and thoughtful features, make the Sigma ART 20mm f/1.4 DG DN the ultimate lens for astrophotography and an ideal companion for any photographically demanding situation.

Highest optical performance on a new level

The Sigma ART 20mm f/1.4 DG DN delivers exceptionally detailed results that easily satisfy the high demands of professional photography and other high-end applications. With 17 glass elements arranged in 15 groups, including two SLD, three aspherical glass elements and the largest class double-sided aspherical glass element in Sigma’s history, the ART 20mm f/1.4 DG DN rigorously suppresses various optical aberrations such as sagittal coma flare or image distortion to produce highly-detailed images with exceptional sharpness and accuracy from the center to the furthest corners, allowing photographers to make use of the entire field of view afforded by its ultra-wide viewing angle.

Designed for perfect results even in the most demanding conditions

Sigma’s outstanding design and high-precision manufacturing capabilities made it possible to equip the Sigma ART 20mm f/1.4 DG DN with a front filter thread despite its very large f/1.4 aperture and 20mm ultra-wide viewing angle. The lens also comes with a rear filter holder, allowing photographers the freedom to combine multiple filters to suit a huge variety of shooting situations for near-unlimited creative potential at an ultra-wide viewing angle—for example, using a front filter to reduce light pollution and a softening filter on the rear to take impressive photographs of nightly landscapes with star-filled skies. The new MFL (Manual Focus Lock) switch to turn off the focus ring makes it easier to concentrate on the shoot without worrying about accidentally changing the focusing distance. Further, the lens also equips a lens heater retainer, meaning that lens heaters used to prevent internal condensation as the temperature drops on longer night shoots will stay securely attached to the barrel without protruding into the image and causing unsightly vignetting. With its brilliant optical power and its full range of useful features despite its compact and lightweight body, the Sigma ART 20mm f/1.4 DG DN is the ultimate choice when photographing the night sky.

Supplied Accessories: Case - Petal-type lens hood with lock (LH878-04) - Front Cap (LCF-82 III) - Rear Cap (LCRII) - Guide Plate (GP-21)