Sigma 20mm F2 DG DN Contemporary Lens (Sony E)

The Sigma 20mm F2 DG DN Contemporary Lens (Sony E) is a meticulously crafted ultra‑wide prime lens designed for full‑frame mirrorless cameras from Sony. Part of Sigma’s advanced I Series, this lens delivers a rare combination of bright f/2 aperture, compact form, and high optical performance — making it perfect for landscapes, cityscapes, astrophotography, creative video, and everyday wide‑angle shooting.

 Ultra‑Wide Creativity with Compact Portability

Lightweight & Everyday Ready

Built with portability in mind, this lens weighs just ≈370 g and measures a sleek ~74 mm length on Sony E‑mount systems. Its small footprint makes it ideal for travel, street photography, and walkaround use without feeling bulky on your mirrorless body.

Bright f/2 Maximum Aperture

Offering a fast f/2 aperture, this lens excels in low light conditions and brings strong subject separation even in challenging lighting. It also helps to control depth of field creatively while maintaining sharp overall image quality.

Practical for Video & Still Photography

Whether you’re shooting handheld video, timelapses, or stills, the wide 20mm field of view combines perfectly with the f/2 aperture to help you capture immersive visuals with appealing background separation and dynamic wide perspectives.

 Optical Excellence & Image Quality

Advanced Lens Construction

The optical formula includes 13 elements in 11 groups, featuring FLD, SLD, and multiple aspherical elements to minimise optical aberrations while maintaining edge‑to‑edge clarity.

Excellent Control of Aberration & Flare

Sophisticated design and coatings help suppress undesirable flare and ghosting, even when shooting toward bright light sources — keeping contrast high and colours accurate.

Astrophotography‑Friendly Design

Special attention has been given to controlling sagittal coma flare, making this lens an excellent choice for capturing star fields and night sky scenes with reduced distortion and clearer pin‑point stars.

Handling & Build Quality

Premium All‑Metal Construction

Part of Sigma’s I Series, this lens boasts a full‑metal barrel and precise mechanical components for durability and a premium feel, with a smooth focus ring and ergonomic handling.

Dust & Splash‑Resistant Mount

The lens mount is sealed to help protect against dust and moisture, ensuring reliability in a variety of shooting environments.

Magnetic Accessories & Practical Features

Includes a magnetic metal lens cap and compatible accessory options such as the magnetic cap holder for convenience when shooting on the go.

 Ideal Use Cases

• Landscape & Nature Photography – capture sweeping vistas with ultra‑wide framing
• Astrophotography & Night Scenes – minimal coma flare for sharper stars
• Cityscapes & Architecture – sharp details and wide coverage
• Creative Wide‑Angle Work – dramatic compositions and environmental portraits
• Video & Vlogging – bright, stable aperture and compact mount performance

Technical Specifications

• Mount: Sony E (Full‑Frame)
• Focal Length: 20 mm
• Maximum Aperture: f/2
• Minimum Aperture: f/22
• Lens Construction: 13 elements in 11 groups
• Diaphragm Blades: 9 (rounded)
• Minimum Focus Distance: ~22 cm / 8.7 in
• Maximum Magnification: 1:6.7
• Filter Size: 62 mm
• Angle of View: ~94.5°
• Dimensions: ~φ70 × 74.4 mm
• Weight: Approx. 370 g