Cameras Ranked

20 Sony FE 20mm F1.8 G vs 24 Sony FE 24mm F1.4 GM

Sony FE 20mm F1.8 G vs Sony FE 24mm F1.4 GM: our pick for most people is the Sony FE 24mm F1.4 GM. Pick the Sony FE 20mm F1.8 G if you carry it all day or travel light, or you want a wider view at the short end (weight: 373 g vs 445 g; focal length: 20 mm vs 24 mm). Pick the Sony FE 24mm F1.4 GM if you shoot in low light or want a blurrier background, or you want more reach at the long end (widest aperture: f/1.8 vs f/1.4; focal length: 20 mm vs 24 mm).

To one scale. Sony FE 20mm F1.8 G: length 84.7 mm, diameter 73.5 mm, filter thread 67 mm; Sony FE 24mm F1.4 GM: length 92.4 mm, diameter 75.4 mm, filter thread 67 mm.84.7 mmSony 20373 g92.4 mmSony 24445 g
Both to one scale, from each maker's length and diameter, the filter thread in yellow. The rings are drawn, not measured.
To one scale. Sony FE 20mm F1.8 G: length 84.7 mm, diameter 73.5 mm, filter thread 67 mm; Sony FE 24mm F1.4 GM: length 92.4 mm, diameter 75.4 mm, filter thread 67 mm.84.7 mmSony 20373 g92.4 mmSony 24445 g
Both to one scale, from each maker's length and diameter, the filter thread in yellow. The rings are drawn, not measured.

The pick, in points

Lead for a pick: 1

Sony 20

4points

Wins on weight and focal length (widest).

Sony 24

5points

Wins on widest aperture and focal length (longest).

Each real difference scores its importance for the side that wins it; a lead under 1 is “it depends”. How the weights work

The Sony 24 on its ownThe Sony 20 on its ownAll Sony E-mount lenses

Where they differ

5 of 17 specs

Each bar is the gap as a share of the smaller value, on one scale from 0 to 100%; an arrow end is a gap past 100%. The dashed tick marks where a gap starts to count.

  1. Widest aperture

    Importance 3

    Sony 20f/1.81Sony 24f/1.42

    0.4 apart (28.6%), to the Sony 24

    3points

  2. Weight

    Importance 2

    Sony 20373 g3Sony 24445 g4

    72 g apart (19.3%), to the Sony 20

    2points

  3. Focal length (longest)

    Importance 2

    Sony 2020 mm1Sony 2424 mm2

    4 mm apart (20%), to the Sony 24

    2points

  4. Focal length (widest)

    Importance 2

    Sony 2020 mm1Sony 2424 mm2

    4 mm apart (20%), to the Sony 20

    2points

  5. Closest focus, wide end

    Importance 1

    Sony 200.19 m3AF modeSony 240.24 m4

    0.05 m apart (26.3%), not counted: compared only between lenses of the same focal length (widest)

    0points

Also different, no weight reads them6

  1. Length

    Sony 2084.7 mm3Sony 2492.4 mm4

    7.7 mm apart (9.1%)

    Not weighted

  2. Diameter

    Sony 2073.5 mm3Sony 2475.4 mm4

    1.9 mm apart (2.6%)

    Not weighted

  3. Maximum magnification, wide end

    Sony 200.2x3AF modeSony 240.17x4

    0.03 apart (17.6%)

    Not weighted

  4. Elements

    Sony 20143Sony 24134

    1 apart (7.7%)

    Not weighted

  5. Groups

    Sony 20123Sony 24104

    2 apart (20%)

    Not weighted

  6. Aperture blades

    Sony 2093Sony 24114

    2 apart (22.2%)

    Not weighted

Side by side, to scale

Focal length on one log scale

Focal length on one log scale: Sony FE 20mm F1.8 G: 20 to 20 mm; Sony FE 24mm F1.4 GM: 24 to 24 mm.Sony 20Sony 24−4 mm+4 mm162435
The focal lengths each maker states.

Specifications

SpecificationsSony FE 20mm F1.8 GSony FE 24mm F1.4 GM
Focal length20 mm124 mm2
Widest aperturef/1.81f/1.42
Closest focus0.19 m (AF mode)30.24 m4
Maximum magnification0.2x (AF mode)30.17x4
Weight373 g3445 g4
Length84.7 mm392.4 mm4
Diameter73.5 mm375.4 mm4
Elements143134
Groups123104
Aperture blades93114
HoodALC-SH1623ALC-SH1544
AnnouncedNot statedSep 20, 20182

Same on both

  • Stabilization No
  • Mount Sony E-mount3
  • Covers Full frame
  • Type Prime
  • Filter thread 67 mm3

Full specifications, side by side†

Show all 19 rows
Full specifications, side by sideSony 203Sony 244
Product nameFE 20mm F1.8 GFE 24mm F1.4 GM
Model numberSEL20F18GSEL24F14GM
Lens mountSony E-mountSony E-mount
Focal length20 mm24 mm
Lens construction12-1410 groups, 13 elements
Angle of view70 (APS-C)61° (APS-C)
Angle of view94 (35mm format)84° (35mm format)
Maximum aperture1.81.4
Minimum aperture2216
Diaphragm blades911
Circular diaphragmyesyes
Filter size67 mm67 mm
Hood typepetal-shaped bayonet typepetal-shaped bayonet type
Dimensions73.5×84.7 mm75.4 x 92.4 mm
Weight373 g445 g
Included hood modelALC-SH162ALC-SH154
Included front cap modelALC-F67SALC-F67S
Included rear cap modelALC-R1EMALC-R1EM
Included case typesoft casesoft carrying case
Rows only one maker lists: 14

Also on the Sony FE 20mm F1.8 G spec page3

Compatible sensor size35mm full-size
Focal length image30 mm (APS-C size sensor)
Minimum focusing distance0.19 m (AF mode)
Minimum focusing distance0.18 m (MF mode)
Maximum magnification ratio0.20 (AF mode)
Maximum magnification ratio0.22 (MF mode)
1.4x teleconverter compatibilityno (1.4x teleconverter)
2.0x teleconverter compatibilityno (2.0x teleconverter)

Also on the Sony FE 24mm F1.4 GM spec page4

Supported sensor size35mm full-size
Equivalent focal length36 mm (APS-C sensor)
Minimum focusing distance0.24 m
Maximum magnification ratio0.17
1.4x teleconverter compatibilityno (1.4x)
2.0x teleconverter compatibilityno (2.0x)

How the pick works

  1. Widest aperture3

    Lower wins once they are 0.3 apart.

  2. Weight2

    Lower wins from a 12% gap.

  3. Focal length (longest)2

    Higher wins from a 15% gap.

  4. Focal length (widest)2

    Lower wins once they are 2 mm apart.

  5. Optical stabilization1

    Having it wins.

  6. Closest focus, wide end1

    Lower wins from a 15% gap. Compared only between lenses of the same focal length (widest).

  7. Filter thread0.5

    Lower wins once they are 5 mm apart.

  8. 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

How we rank, in full

Sources

  1. Wikidata: Sony FE 20mm F1.8 G, checked Oct 9, 2026 (CC0 1.0)
  2. Wikidata: Sony FE 24mm F1.4 GM, checked Oct 9, 2026 (CC0 1.0)
  3. Sony Japan lens specifications (sony.jp): Sony FE 20mm F1.8 G, checked Oct 6, 2026
  4. Sony Japan lens specifications (sony.jp): Sony FE 24mm F1.4 GM, 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.

What we don't know yet

  • Announced for the Sony FE 20mm F1.8 G: our sources don't state it yet.

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