20 Sony FE 20mm F1.8 G
The Sony FE 20mm F1.8 G is a prime lens for Sony E-mount (Full frame) that covers 20 mm at f/1.8, weighs 373 g and focuses as close as 0.19 m. Next to 10 other full frame Sony E-mount prime lenses in its focal range, it suits you if you shoot in low light or want a blurrier background, or you want a wider view at the short end. If you carry it all day or travel light, every other one that does better on weight gives up brightness. If you want more reach at the long end, every other one that does better on reach gives up width.
- f/1.8widest aperture
- 373 gweight
- 51bodies it fits
Where it sits
11 lensesFull frame Sony E-mount prime lenses in its focal range that state each value, this one included. Each tick is one; the thick one is this one.
- Weight11 state it373 g
162 g, Sony FE 24mm F2.8 G630 g, Sigma 20mm F1.4 DG DN
- Closest focus, wide end11 state it0.19 mAF mode
0.108 m, Sigma 24mm F3.5 DG0.25 m, Sigma 24mm F1.4 DG DN
- Filter thread11 state it67 mm
49 mm, Sony FE 24mm F2.8 G82 mm, Sigma 20mm F1.4 DG DN
Bodies it fits
51 bodies- Fits
Full frame bodies
- Sony FX2
- Sony FX3
- Sony VLOGCAM ZV-E1
- Sony a1
- Sony a1 II
- Sony a7
- Sony a7 II
- Sony a7 III
- Sony a7 IV
- Sony a7 V
- Sony a7C
- Sony a7C II
- Sony a7CR
- Sony a7R II
- Sony a7R III
- Sony a7R IIIA
- Sony a7R IV
- Sony a7R IVA
- Sony a7R V
- Sony a7R VI
- Sony a7S
- Sony a7S II
- Sony a7S III
- Sony a9
- Sony a9 II
- Sony a9 III
- Fits
APS-C bodies
It mounts and works fully. It covers a bigger frame than their APS-C sensor, which records the middle of it.
- Sony FX30
- Sony NEX-3
- Sony NEX-3N
- Sony NEX-5
- Sony NEX-5N
- Sony NEX-5R
- Sony NEX-5T
- Sony NEX-6
- Sony NEX-7
- Sony NEX-C3
- Sony NEX-F3
- Sony VLOGCAM ZV-E10
- Sony VLOGCAM ZV-E10 II
- Sony a3000
- Sony a5000
- Sony a5100
- Sony a6000
- Sony a6100
- Sony a6100A
- Sony a6300
- Sony a6400
- Sony a6400A
- Sony a6500
- Sony a6600
- Sony a6700
Compared with
1 comparisons- Sony FE 24mm F1.4 GM
Pick: the Sony FE 24mm F1.4 GM, 5 to 4. The Sony FE 20mm F1.8 G wins on weight and focal length (widest). The Sony FE 24mm F1.4 GM wins on widest aperture and focal length (longest).
Specifications
Sources
- Wikidata, checked Oct 9, 2026 (CC0 1.0)
- Sony Japan lens specifications (sony.jp), checked Oct 6, 2026
Worked out by code, not stated by a source
- Read from the lens name: each maker marks the sensor size a lens covers (Sony FE/E, Canon RF/RF-S, Nikon DX, Tamron Di III/Di III-A, Sigma DG/DC); every Fujifilm X lens is APS-C and every Micro Four Thirds lens is Four Thirds.
- Read from the lens name: Sony marks optically stabilized lenses OSS, Canon IS, Nikon VR, Fujifilm OIS, Panasonic O.I.S., Tamron VC and Sigma OS; a lens from these makers without the mark has no optical stabilization.
- Prime or zoom, read from the focal length in the lens name.
Each value is checked automatically against the source it links, on the date shown. How we build these pages
† The makers' own tables, row by row, with labels in our plain words (translated where the maker's page isn't in English); each row's numbers are checked against the page it links.
More
Full specifications†
Show all 27 rows
| Full specifications | Sony FE 20mm F1.8 G2 |
|---|---|
| Product name | FE 20mm F1.8 G |
| Model number | SEL20F18G |
| Lens mount | Sony E-mount |
| Compatible sensor size | 35mm full-size |
| Focal length | 20 mm |
| Focal length image | 30 mm (APS-C size sensor) |
| Lens construction | 12-14 |
| Angle of view | 70 (APS-C) |
| Angle of view | 94 (35mm format) |
| Maximum aperture | 1.8 |
| Minimum aperture | 22 |
| Diaphragm blades | 9 |
| Circular diaphragm | yes |
| Minimum focusing distance | 0.19 m (AF mode) |
| Minimum focusing distance | 0.18 m (MF mode) |
| Maximum magnification ratio | 0.20 (AF mode) |
| Maximum magnification ratio | 0.22 (MF mode) |
| Filter size | 67 mm |
| 1.4x teleconverter compatibility | no (1.4x teleconverter) |
| 2.0x teleconverter compatibility | no (2.0x teleconverter) |
| Hood type | petal-shaped bayonet type |
| Dimensions | 73.5×84.7 mm |
| Weight | 373 g |
| Included hood model | ALC-SH162 |
| Included front cap model | ALC-F67S |
| Included rear cap model | ALC-R1EM |
| Included case type | soft case |
How the pick works
- Widest aperture3
Lower wins once they are 0.3 apart.
- Weight2
Lower wins from a 12% gap.
- Focal length (longest)2
Higher wins from a 15% gap.
- Focal length (widest)2
Lower wins once they are 2 mm apart.
- Optical stabilization1
Having it wins.
- Closest focus, wide end1
Lower wins from a 15% gap. Compared only between lenses of the same focal length (widest).
- Filter thread0.5
Lower wins once they are 5 mm apart.
- Lead for a pick1
Our pick or our take adds up the importance of each real difference, with these importances and thresholds: a gap smaller than its row's threshold is too close to call and counts as the same. They are our editorial choice, not a measurement, the same on every page, and they never read prices, sales or who sells it.
Paid placements0