Sony
FE 20mm F1.8 G
Sony E Mount
FE 20mm F1.8 G — 20mm f/1.8 for Sony E, a popular choice in the sony lineup.
$899
Launch priceReleased Feb 2020
Sony
FE 50mm F1.4 GM
Sony E Mount
FE 50mm F1.4 GM — 50mm f/1.4 for Sony E, a popular choice in the sony lineup.
$1,799
Launch priceReleased Mar 2025
FE 50mm F1.4 GM is 5 years newer.
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Wins
FE 20mm F1.8 G
Wins
FE 50mm F1.4 GM
3 categories tied
TL;DR — Key differences
- AFE 20mm F1.8 G has lower Weight (373 g vs 580 g)
- BFE 50mm F1.4 GM has lower Max aperture (Wide) (f/1.4 vs f/1.8)
- BFE 50mm F1.4 GM has lower Max aperture (Tele) (f/1.4 vs f/1.8)
- AFE 20mm F1.8 G has lower Length (102 mm vs 131 mm)
- BFE 50mm F1.4 GM has lower Diameter (81 mm vs 86 mm)
Key specs at a glance
Use-case scoring
Which one for what?
Algorithmic scores from verified specs · 10 = best in class
Why pick one over the other
Reasons to choose the FE 20mm F1.8 G
- ✓
Weight
373 g vs 580 g — lower is better
- ✓
Length
102 mm vs 131 mm — lower is better
Reasons to choose the FE 50mm F1.4 GM
- ✓
Special elements
Adds ED
- ✓
Control ring
Only FE 50mm F1.4 GM supports it
- ✓
Custom function button
Only FE 50mm F1.4 GM supports it
- ✓
Max aperture (Wide)
f/1.4 vs f/1.8 — lower is better
- ✓
Max aperture (Tele)
f/1.4 vs f/1.8 — lower is better
- ✓
Diameter
81 mm vs 86 mm — lower is better
Shared specifications
Min focus distance
Both 30 cm
Max magnification
Both 0.15 ×
Internal focus
Both support internal focus
Weather sealing
Both support weather sealing
Pros & cons at a glance
Editorially curated highlights and trade-offs.
FE 20mm F1.8 G
Pros
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Weather-sealed construction for outdoor shooting
- ✓Lightweight design easy to carry all day
Cons
- –Third-party or older alternatives may offer better value
FE 50mm F1.4 GM
Pros
- ✓Bright f/1.4 aperture for low light and subject separation
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Weather-sealed construction for outdoor shooting
Cons
- –Third-party or older alternatives may offer better value
Decided which one is right for you?
Compare live prices for the FE 20mm F1.8 G and FE 50mm F1.4 GM at major authorized retailers.
Sony FE 20mm F1.8 G
Sony FE 50mm F1.4 GM
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.