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Sigma 20mm F2 DG DN Contemporary Lens for Mirrorless Cameras, Sony E-Mount
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SKU
SIG490965
$769.00
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Key Features
- Fast F2 ultra wide prime: Capture low light scenes and night skies with confidence.
- Compact I series build: All metal construction at only 370 g keeps full frame kits light.
- Advanced optics: FLD, SLD and three aspherical elements control aberrations and distortion.
- Reliable flare control: Nano Porous and Super Multi Layer coatings maintain contrast in backlight.
- Tactile aperture ring: Manual ring with clear clicks gives precise, intuitive exposure control.
- Fast autofocus for hybrid use: Stepping motor supports Sony AF and modern mirrorless video.
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Sigma 20mm F2 DG DN Contemporary Lens for Mirrorless Cameras, Sony E-Mount Overview
Description
The Sigma 20mm F2 DG DN | Contemporary for Sony E-mount is a compact full frame ultra wide prime that balances optical performance, build quality and portability. With a bright F2 aperture, advanced optical design and high speed autofocus, it is built for demanding hybrid creators who shoot both stills and video.
Part of Sigma's premium I series, this all metal 20mm lens delivers crisp edge to edge detail, pleasing bokeh and strong flare control while weighing only 370 g. It is an ideal companion for landscapes, interiors, vlogging, travel and night sky work on Sony full frame and APS C mirrorless bodies.
The Sigma 20mm F2 DG DN | Contemporary is a full frame Sony E-mount wide angle prime designed from the ground up for mirrorless cameras. It delivers excellent sharpness across the frame, even at F2, in a small I series form factor that matches modern compact bodies.
Problem
Many wide angle primes for Sony full frame are either large and heavy or compromise on build quality and edge performance. Creators also struggle with lenses that lack meaningful weather protection, have noisy focus for video or do not control flare well in backlit scenes.
- Limited sealing on some compact primes makes outdoor shooting less reassuring.
- Focus noise and clicky aperture rings can be distracting for video work.
- Lack of optical stabilization and softer extreme corners at wide apertures concern some users.
Solution
This 20mm F2 I series lens brings together a bright aperture, advanced optical construction and a premium metal build in a compact package. High precision FLD, SLD and aspherical elements, plus modern coatings, help maintain sharpness and contrast from center to edges, while the lens stays small enough for daily carry and gimbal use.
Benefits
- Consistent image quality: Delivers crisp detail across the frame when stopped down for landscapes.
- Low light performance: F2 aperture supports cleaner ISO settings for interiors and night work.
- Travel friendly size: Short barrel and 370 g weight suit compact rigs and handheld vlogging.
- Premium user experience: All metal exterior, knurled rings and magnetic cap enhance handling.
Applications
- Astrophotography and night landscapes where a fast ultra wide view is essential.
- Travel, street and everyday carry on Sony full frame and APS C mirrorless bodies.
- Architecture, interiors and real estate work that needs clean, wide coverage.
Why Choose This Lens
- A unique 20mm F2 I series prime that combines all metal construction, compact size and strong optical performance at a mid tier price point for Sony E-mount shooters.
Specifications
| Model Name / Number | 20mm F2 DG DN | Contemporary (C022), Sony E-mount |
| Release Year | 2022 |
| Lens Type | Prime wide angle lens |
| Intended Use | Photography and video |
| Color / Finish | Black, all metal I series exterior |
| Weather Sealing | Dust and splash resistant mount |
| Dimensions (Diameter Length) | 70 mm 74.4 mm |
| Weight | 370 g |
| Mount Type | Sony E |
| Compatible Sensor Size | Full frame, supports APS C with 30 mm equivalent view |
| Supported Camera Brands / Systems | Sony E-mount mirrorless cameras |
| Coverage | Full frame 35 mm image circle |
| Adapter Compatibility | Native Sony E-mount, no adapter required |
| Focal Length (Fixed / Zoom Range) | 20 mm fixed focal length |
| Focal Length (35mm Equivalent for Crop Sensors) | 30 mm equivalent on Sony APS C bodies |
| Maximum Aperture | F2 |
| Minimum Aperture | F22 |
| Aperture Type (Circular, Number of Blades) | Rounded 9 blade diaphragm |
| Optical Construction (Elements / Groups) | 13 elements in 11 groups |
| Special Elements (Aspherical, ED, Fluorite, etc.) | 1 FLD element, 1 SLD element, 3 aspherical elements |
| Coatings (Nano Coating, Multi-Coating, Fluorine Coating) | Nano Porous Coating and Super Multi Layer Coating |
| Focus Type (Autofocus, Manual Focus) | Autofocus with manual focus support |
| Autofocus Motor Type (Stepper, Ring-USM, Linear, Screw Drive) | Stepping motor |
| Focus Modes (AF-S, AF-C, MF) | AF modes set on camera body, plus manual focus |
| Focus Range Limiter (Yes/No) | No focus limiter switch |
| Minimum Focus Distance | 22 cm |
| Maximum Magnification Ratio | 0.15x, 1:6.7 reproduction |
| Internal Focusing (Yes/No) | Yes, internal focusing design |
| Full-Time Manual Override (Yes/No) | Yes, supports DMF and AF plus MF |
| Optical Stabilization (Yes/No) | No optical image stabilization |
| Number of Aperture Blades | 9 |
| Aperture Shape (Rounded, Polygonal) | Rounded aperture blades |
| Control Type (Electronic, Mechanical) | Manual aperture ring with camera control interface |
| Filter Thread Size (mm) | 62 mm front thread |
| Front Element Rotation (Yes/No) | No, front does not rotate during focusing |
| Compatible Lens Hood Model | Petal type lens hood LH656-03 |
| Drop-in Filter Slot (Yes/No) | No drop in filter slot |
| Rear Gel Filter Holder (Yes/No) | No rear gel filter holder |
| Focus Breathing Control | Focus breathing is kept low for video framing consistency |
| Clickless Aperture Option | Aperture ring has clicks, not fully clickless from factory |
| Tripod Collar (Removable / Rotating) | No tripod collar |
| Weather Resistance Seals | Seal around mount for basic outdoor use |
| Firmware Upgradable | Yes, lens firmware can be updated when available |
| Brand | Sigma |
| Manufacturer SKU | 490965 |
| UPC | 85126490652 |
What’s included
- 1- 20mm F2 DG DN Contemporary Lens, Sony E-Mount
- 1- Lens Hood - LH656-03
- 1- Front Cap - LCF-62mm III
- 1- Rear Cap - LCR II
- 1- Magnetic Metal Lens Cap - LCF62-01M
Compatibility
| Sony full frame E-mount bodies | Sony APS C E-mount bodies | 62 mm screw in filter systems | Gimbals supporting 370 g lenses | Peak Design Capture Clip setups |
| Sigma I series F2 prime set users | Sigma USB Dock accessories lineup | Tripods and travel supports | Photo and video rigs for vlogging | Real estate and interior shooters |
FAQ
Is the Sigma 20mm F2 DG DN suitable for astrophotography?
Yes, the fast F2 aperture, 20 mm ultra wide field of view and well controlled sagittal coma flare make this lens a strong choice for night sky and astro landscape photography on Sony full frame bodies.
Does this lens have optical image stabilization?
No, the Sigma 20mm F2 DG DN does not include optical stabilization, it relies on Sony body based stabilization or support such as tripods or gimbals for steady video and long exposure work.
How sharp is the lens at the edges of the frame?
The lens is designed to deliver high resolution from center to periphery, with very good edge and corner sharpness when stopped down a little, which is ideal for landscapes, architecture and interiors.
Is the autofocus quiet enough for video recording?
The stepping motor focusing system is generally fast and fairly quiet for hybrid use, although critical video shooters may still pick up some focus noise in very quiet environments, so an external mic is recommended.
What level of weather protection does the lens offer?
The barrel is all metal and the mount area includes dust and splash resistant sealing, which supports careful outdoor use, however it is not a fully weather sealed lens for heavy rain or harsh conditions.
Which Sony cameras are compatible with this lens?
The lens is designed for Sony E-mount mirrorless cameras, it covers full frame sensors and also works on APS C bodies where it provides a 30 mm equivalent field of view.
What filter size does the Sigma 20mm F2 DG DN use?
This lens uses a 62 mm front filter thread, allowing you to mount common UV, polarizer and neutral density filters without vignetting in normal use.
Does the front element rotate when focusing?
No, the internal focusing design means the front of the lens does not rotate, which helps when using polarizing or graduated filters that need a fixed orientation.
What is included in the box with this lens?
In the box you receive the Sigma 20mm F2 DG DN | Contemporary lens for Sony E, a magnetic metal front cap, a standard front cap, a rear cap and the petal type lens hood, which gives you a complete ready to shoot package.
Who is this 20mm F2 I series lens best suited for?
This lens is ideal for enthusiasts and hybrid creators who want a compact, premium feeling ultra wide prime for landscapes, travel, architecture, vlogging and astrophotography on Sony full frame and APS C cameras without carrying heavy glass.
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