Sigma 20mm f1.4 DG DN Art Lens - L Mount

Sigma 20mm F1.4 DG DN Art Lens – L-Mount

Ultra-Fast, Ultra-Sharp, Ultra-Wide

The Sigma 20mm F1.4 DG DN Art is the definitive ultra-wide prime for full-frame mirrorless cameras, offering exceptional sharpness, ultra-fast performance, and advanced professional features. With its wide F1.4 maximum aperture, this lens is perfect for astrophotography, landscapes, interiors, weddings, travel, architecture, and environmental portraits.

Engineered for professional image quality, the lens incorporates cutting-edge optical elements to minimise chromatic aberration, sagittal coma flare, and distortion. Whether capturing starscapes, cityscapes, or dramatic low-light scenes, this 20mm prime delivers stunning clarity and detail from the centre of the frame right to the edges.

Key Features

• Ultra-wide 20mm focal length – ideal for landscapes, astro, interiors & portraits

• Bright F1.4 maximum aperture – superb in low light & for shallow depth-of-field

• 17 elements in 15 groups, including 3 aspherical & 2 SLD elements

• Largest double-sided aspherical glass element in Sigma’s history

• Professional feature set: de-clickable aperture ring, AFL button, Manual Focus Lock

• Rear filter holder + 82mm front thread for versatile filter use

• Lens heater retainer – designed with astrophotography in mind

• Robust petal-type hood with lock and dust/splash-resistant brass mount

• Premium Art-line build quality with TSC construction

• Available in L-Mount & Sony E

Professional Build Quality

The 20mm F1.4 DG DN Art reflects Sigma’s renowned Art-series craftsmanship, combining Thermally Stable Composite (TSC) with aluminium parts for strength and consistency across temperature changes.

• Rubberised focus ring ensures precise manual control.

• Internal focusing keeps the lens length constant – ideal for gimbals.

• Aperture ring with click/de-click and lock switches for intuitive operation.

• Durable brass mount with rubber seal for dust and splash resistance.

The included petal-type hood locks securely in place and features a textured grip for easy fitting and removal.

Advanced Feature Set

Designed for both photographers and film-makers, this lens includes:

• AF/MF switch for quick focus control.

• Customisable AFL button for assigning camera functions.

• Manual Focus Lock to prevent accidental adjustments once focus is set.

• Lens heater retainer – keeps astro-heaters securely in place to prevent fogging.

• Rear filter holder – perfect for lightweight gel filters, supplied with a template for custom cuts.

High-Performance Optics

With 17 optical elements in 15 groups, this lens offers uncompromising image quality:

• 3 aspherical & 2 SLD elements for razor-sharp detail across the frame.

• Exceptional coma control, making it a leading choice for astrophotography.

• Advanced coatings reduce flare and ghosting, ensuring high-contrast results with rich colour accuracy.

• Minimal distortion and vignetting even at F1.4.

Whether shooting night skies, city architecture, or environmental portraits, the 20mm captures images with superb edge-to-edge detail.

Creative Flexibility

• Environmental portraits: Ultra-wide angle plus F1.4 aperture allows subjects to stand out against dramatic backdrops.

• Close-up potential: With a 23cm minimum focusing distance and 1:6.1 magnification, the lens handles striking close-ups with beautiful bokeh.

• Astro and low-light: Wide aperture and coma control ensure pinpoint star rendering and smooth night-time performance.

Specifications

• Lens Construction: 17 elements in 15 groups

• Angle of View: 94.5°

• Diaphragm Blades: 11 (rounded)

• Maximum Aperture: F1.4

• Minimum Aperture: F16

• Minimum Focusing Distance: 23cm

• Maximum Magnification Ratio: 1:6.1

• Filter Thread: 82mm

• Dimensions: ø87.8mm × 111.2mm

• Weight: 635g

• AF Mounts Available: L-Mount | Sony E

Mount Barcodes:

• L-Mount: 00-85126-414696

• Sony E: 00-85126-414658

Why Choose the Sigma 20mm F1.4 DG DN Art?

This lens combines professional-grade optical performance with a robust, feature-rich design tailored for demanding genres like astrophotography, architecture, and environmental portraiture. With outstanding corner sharpness, advanced coatings, and reliable build quality, it stands as one of the finest ultra-wide primes available for mirrorless systems.