Sigma Announces 20mm F2 DG DN Contemporary Lens

Sigma has announced a new 20mm F2 DG DN full-frame lens for Sony E-mount and the L-Mount camera systems.

The 20mm is the seventh lens in their I Series of all-metal lenses designed for mirrorless camera systems such as Sony’s E-mount.

The new 20mm lens is constructed of 13 elements in 11 groups, including one ‘F’ low dispersion element, one Special low dispersion element and three aspherical elements.

Sigma’s Super Multi-Layer Coating and Nano Porous Coating (NPC) has also been used to help reduce flaring and ghosting.

Here’s a short promotional video from Sigma:

The lens is capable of smooth, quiet and high-speed AF made possible by a stepping motor, and also supports Face/Eye Detection AF and video AF.

The focus ring can be configured to work either linearly or non-linearly but only for L-Mount cameras I’m afraid.

There’s also a physical aperture ring that controls the rounded nine-blade aperture diaphragm and a focus mode switch.

The minimum focusing distance is 22cm (8.7”, an aperture range of F2 through F22, a 62mm front filter thread and a 94.5-degree angle of view.

The E-mount version measures φ70mm × 74.4mm / φ 2.8in. x 2.9in and weighs 370g / 13.1oz.

Sigma says the lens will be available to purchase for Sony E-mount and L-mount cameras starting February 25, 2022 for a suggested retail price of $699 in the US and £649 in the UK.

Early Reviews

Here’s a selection of early reviews on YouTube.

Christopher Frost

Arthur R

Gordon Laing

Pav Sv

B&H Photo

Tom Calton

https://youtu.be/F9mrKcPAHTo (not really safe for viewing at work!)

Key Specifications

Name:	Sigma 20mm F2 DG DN Contemporary
Mount:	Sony E-Mount + L-Mount
Focal Length:	20mm
Maximum Aperture:	F2
Minimum Aperture:	F22
Lens Construction:	11 groups, 13 elements (1 FLD, 1 SLD and 3 aspherical lens elements)
Angle of View (Full-Frame):	94.5°
Maximum Magnification Ratio:	1:6.7
Aperture Blades:	9 (rounded diaphragm)
Minimum Focussing Distance:	22cm / 8.7in.
Filter Size:	62mm
Lens Size (E-mount):	φ70mm × 74.4mm / φ 2.8in. x 2.9in.
Weight:	370g / 13.1oz.

Further details and sample images can be found on Sigma’s website.