Exceptional Clarity for the Night Sky

An ultra-wide Sony E-mount prime designed for full-frame mirrorless systems, the Sigma 20mm f/1.4 DG DN Art delivers uncompromising sharpness, control, and low-light performance. With its bright f/1.4 aperture and refined optical design, this lens is a top choice for landscape, architectural, and especially astrophotography enthusiasts who demand edge-to-edge precision under the stars.

Unmatched Optical Performance

Part of Sigma’s Art line, this 20mm prime integrates two SLD and three aspherical elements, including a concave double-sided aspherical element, to minimize chromatic aberrations and distortion while ensuring outstanding edge-to-edge sharpness. Combined with in-camera corrections and an advanced optical design, it maintains excellent control over sagittal coma flare, producing pinpoint stars across the frame—a must for astrophotographers.

A Super Multi-Layer Coating enhances contrast and color neutrality by suppressing ghosting and flare, even in backlit environments, while maintaining the rich tonal depth Sigma lenses are known for.

Astrophotography-Optimized Features

Engineered with the night sky in mind, the lens includes several specialized tools for astrophotography:

• Manual Focus Lock (MFL) switch disables the focus ring to prevent accidental changes during long exposures.

• Curved lip design at the lens front accommodates lens heaters securely during cold weather.

• Rear filter holder supports sheet-type filters for creative flexibility, while the rare 82mm front filter thread allows ND or polarizing filters—uncommon in ultra-wide primes.

Precision Autofocus and Handling

Driven by a quiet STM stepping motor, the internal focusing system ensures smooth, precise autofocus for both stills and video. A dedicated aperture ring features both click and lock switches, giving photographers tactile control and preventing accidental adjustments.

The rounded 11-blade diaphragm delivers beautiful, smooth bokeh, and the petal-shaped hood minimizes flare while protecting the lens. Built with a brass bayonet mount, the 20mm f/1.4 ensures long-term precision and durability, even in demanding shooting conditions.