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Sony FE 20mm f/1.8 G Full-Frame Large-Aperture Ultra-Wide Angle G Lens

  • mfr: SEL20F18G
  • SKU: SEL20F18G
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Product highlights

  • Focal length: 20mm on full-frame (30mm on APS-C)
  • Aperture range: f/1.8-22
  • Sony E-mount lens
  • Full frame and APS-C format
  • Quiet internal focusing
  • Two advanced aspherical elements
  • Three ED (Extra-Low Dispersion) glass
  • Two XD extreme dynamic linear motors
  • 9-blade circular aperture contributes to gorgeous bokeh
  • Ideal for still and video creators

Sony FE 20mm f/1.8 G Full-Frame Large-Aperture Ultra-Wide Angle G Lens

This new addition to Sony’s Prime G Lenses is an ultra-wide 20mm that gives to edge-to-edge sharpness with a fast f/1.8 maximum aperture. The XD (Extreme Dynamic) Linear focus motors allow for smooth and quick focusing. It optical design employs two AA (Advanced Aspherical) elements and three ED (Extra-low Dispersion) glass elements that combine to accurately reproduce point light sources with high contrast. As a result you get crisp, clear images with minimal sagittal flaring of challenging subjects such as night scenes and starry skies. The lens’ lightweight design makes it ideal for videographers and vloggers, and perfectly suits a wide variety of scenarios like landscape, street, starry-nights, and environmental portraits. A special Nano Anti-reflective coating on lens elements suppresses reflections, flare and ghosting, while the fluorine coating on the front lens element repels water, oil, and other contaminants for sharp, clear images.

30mm Equivalent on APS-C Bodies

This lens weighs just 0.82 pounds and measures in at only 2.89 x 3.33 inches. It’s small size and lightweight design enhance mobility when used with compact E-mount Full-frame or APS-C camera bodies and is ideal for use on gimbals or accessory grips.

Beautiful, Natural-Looking Bokeh

The lens’ maximum f/1.8 aperture maintains exposure and depth of field, allowing you to isolate your subject from the foreground and background with amazing light gathering capabilities when shooting wide open. When changing your aperture to defocus the background, the areas out of the focal plane appear blurred. As expected from a G Lens, the Sony FE 20mm f/1.8 G lens delivers a smooth, natural-looking bokeh. A large f/1.8 aperture combined together with a 9-blade circular aperture mechanism and precise control over spherical aberration characteristics help achieve an amazing defocused background quality.

Advanced Optical Performance

At the heart, the Sony 20mm Prime G Lens uses two AA (Advanced Aspherical) elements and three ED (Extra-low Dispersion) glass elements. The Advanced Aspherical) elements help achieve high corner-to-corner resolution even with the narrow depth-of-field produced at the lens’s maximum f/1.8 aperture. On the other hand, the three ED (Extra-low Dispersion) glass elements virtually remove axial chromatic aberration and chromatic aberration to achieve significantly reduced flare and ghosting. This gives you high resolution images with maximum bokeh featuring precisely rendered edges with no fringing or unnatural coloration.

XD Linear Motors for Fast, Precise, Quiet Focusing

The FE 20mm f/1.8 G lens incorporates a precision internal focus mechanism consisting of two XD (extreme dynamic) Linear Motors that help deliver high-speed, smooth autofocusing. With new control algorithms, it is possible to smoothly drive the lens’s focus group achieving silent, low-vibration and continuous autofocus in both still and video modes.

Instant Auto/Manual Focus Selection

An AF/MF switch on the side of the lens lets you quickly switch between auto and manual focus modes for a faster and easier operation. Linear Response MF (manual focus) ensures that the focus ring responds directly and linearly to subtle control when focusing manually.

Aperture Ring with Switchable Click Stops

In addition to providing the fast, hands-on response required for still and videos, the Sony FE 20mm f/1.8 G lens’s aperture ring includes an on/off switch for its click stops. You can switch it on for tactile feedback when shooting stills or switch it off for silent control when shooting movies. The combination of quiet XD Linear Motors and the quiet operation available when the click stops are switched off is great for smooth, seamless aperture control when shooting movies or capturing events where noise must be minimized.


Weight 13.2oz (373g)
Color Black
Lens Mount Sony E-Mount
Maximum Aperture f/1.8
Minimum Aperture f/22
Focal Length 20mm
Maximum Magnification 0.20x (AF), 0.22x (MF)
Angle of view 94 degrees
Minimum Focus Distance 0.63 feet (AF), 0.59 feet (MF) (0.19 m [AF], 0.18 m [MF])
Focus Type Auto and Manual Focus
Diaphragm Blades 9
Optical Design 14 Elements in 12 Groups
Fixed Focal Length 20mm
Lens Format Full Frame Sensors
Lens Type Wide Angle
Special Designs Mirror Lenses


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Ratings and reviews

Sony FE 20mm f/1.8 G Full-frame Large-aperture Ultra-wide Angle G Lens

Sony FE 20mm f/1.8 G Full-Frame Large-Aperture Ultra-Wide Angle G Lens SKU: SEL20F18G

Rated 5 out of 5 by from Impressive Prime for Astro This was recommended to me by several people for astrophotography and it does not disappoint. Its 1.8 aperture allows so much light and makes focusing on stars so much easier. Very little coma.
Date published: 2023-12-21
Rated 5 out of 5 by from Outstanding images I’ve been using his about a month now and am very impressed. I was looking for a multipurpose wide angle for Astro photography that would also be useful for landscape and am very happy with this lens. 20mm is a good sweet spot between the ultra wide 14 and the somewhat 24mm. This lens does outperform the 24mm gm in terms of sharpness. Distortion is minimal, handles flare very well and little to no fringing. Perfect lens for 2 prime lens backcountry travel. This and the 55 1.8 is an extremely lightweight and compact combo.
Date published: 2023-08-05
Rated 4 out of 5 by from Excellent lens! I bought this lens last year after acquiring the my A7C. The 20mm f1.8 is outstanding particular for indoor limited light use. I personally dislike using flashes under any circumstances as it proves difficult to adjust (for me) even in post. This lens gives me the freedom to use it for limited light situations and still achieve great results.
Date published: 2023-02-13
Rated 5 out of 5 by from Excellent wide angle lens I've been using this wide angle lens for a little over a month. Sharp images and its also great for astrophotography! I love this lens and glad that I bought it.
Date published: 2022-01-07
Rated 5 out of 5 by from Sharp sharp!! Super sharp lens, great focal length, well built with all the manual controls.
Date published: 2021-10-29
Rated 3 out of 5 by from Defect? I just took delivery of this lens and have not used it yet so I cannot verify performance. But I am questioning the construction. When I hold the lens horizontally and gently rock it back and forth, I can feel a weight shift from end to end stopping with a gentle thud on each end. It is hard to tell but the distance of travel could be a cm or so. The construction does not feel tight; all my other Sony lenses over the year (about 8) have all felt rock solid. Is this lens defective? I will test out the optics and focus performance this weekend.
Date published: 2021-03-17
Rated 5 out of 5 by from Awesome lens! Wildlife shooter looking to branch out to other forms of photography. After much research I went with this lens and so far I'm really pleased with it.
Date published: 2021-01-08
Rated 5 out of 5 by from Excellent Lens The 20mm F1.8 is a must to have! I love it! One of my favorite lenses so far.
Date published: 2020-11-23
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