Sony E lens

Sigma 20mm F2 DG DN Contemporary

20 mm, f/2, made for full frame. It mounts natively on 8 of our APS-C cameras; on the a6400 it frames like 30 mm.

20 mm · 30 mm equiv. on a6400
f/2
62 mm filter
370 g

74.4 mm long70 mm62 mm filter thread

Drawn from Sigma's published size: 70 × 74.4 mm. Details simplified.

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On your camera

The view, the weight with the camera (battery and card included) and what the maker says about each pair. Sigma makes this lens for each mount; Sigma publishes the cameras it supports and lens firmware updates on its own site. It is made for full-frame sensors and covers APS-C with room to spare.

Every camera in our catalogue this lens mounts on: 8
Camera	View (35 mm equiv.)	With the camera	Fit and maker's notes
Sony a6000	30 mm	714 g	Fits and works Native mount: it fits and works. Neither the lens nor the camera is stabilised; use a faster shutter speed or a support.
Sony a6100	30 mm	766 g	Fits and works Native mount: it fits and works. Neither the lens nor the camera is stabilised; use a faster shutter speed or a support.
Sony a6400	30 mm	773 g	Fits and works Native mount: it fits and works. Neither the lens nor the camera is stabilised; use a faster shutter speed or a support.
Sony a6600	30 mm	873 g	Fits and works
Sony a6700	30 mm	863 g	Fits and works
Sony ZV-E10	30 mm	713 g	Fits and works Native mount: it fits and works. Neither the lens nor the camera is stabilised; use a faster shutter speed or a support.
Sony ZV-E10 II	30 mm	747 g	Fits and works Native mount: it fits and works. Neither the lens nor the camera is stabilised; use a faster shutter speed or a support.
Sony FX30	30 mm	1,016 g	Fits and works

What it frames

30 mm30 mm30 mm

Highlighted: this lens on the a6400. A zoom's dashed frame is its longest view.

At its closest (22 cm from the sensor) it fills the frame of the a6400 with a subject about 16 cm wide.

On the a6400, to scale

Side view drawn from the published depth of the camera and length of the lens. 773 g together.

Every lens with a 62 mm thread

Other standard primes for Sony E

The nearest in focal length, with the numbers that differ.

Sony E 20mm F2.830 mm equiv. · f/2.8 · 69 g (−301 g) · 49 mmCompare
Sony FE 20mm F1.8 G30 mm equiv. · f/1.8 · 373 g (+3 g) · 67 mmCompare
Viltrox AF 20mm F2.830 mm equiv. · f/2.8 · 157 g (−213 g) · 52 mmCompare
Sigma 23mm F1.4 DC DN Contemporary35 mm equiv. · f/1.4 · 330 g (−40 g) · 52 mmCompare
Tokina atx-m 23mm F1.435 mm equiv. · f/1.4 · 276 g (−94 g) · 52 mmCompare
Viltrox AF 23mm F1.435 mm equiv. · f/1.4 · 260 g (−110 g) · 52 mmCompare

Questions about this lens

Which cameras does the Sigma 20mm F2 DG DN Contemporary fit?

8 APS-C cameras in our catalogue: a6000, a6100, a6400, a6600, a6700, ZV-E10, ZV-E10 II, FX30. It is made for full frame, so it also fits the full-frame cameras on its mount.

What does it frame like on APS-C?

20 mm frames like 30 mm on the a6400 (1.5x).

What filter size does it take?

62 mm screw-in filters. Every lens with a 62 mm thread.

Where these facts come from

Facts checked 9 Oct 2026 against the makers' specification pages. How we check

Size, weight, filter thread, close focus and magnification are Sigma's published figures. We have not tested this lens; for image quality, read reviews from people who have.

Specifications

Mount: Sony E
Made for: Full-frame sensors (covers APS-C too)
Focal length: 20 mm
Maximum aperture: f/2
Lens stabilisation: No
Weather sealing: Not stated by the maker
Filter thread: 62 mm
Weight: 370 g
Size (diameter × length): 70 × 74.4 mm
Closest focus: 22 cm
Maximum magnification: 0.15x
Autofocus: Yes
Announced: 2022