Sigma
20mm F1.4 DG DN Art
Sony E Mount
20mm F1.4 DG DN Art — 20mm f/1.4 for Sony E, a popular choice in the sigma lineup.
$899
Launch priceReleased Aug 2022
Sony
FE 50mm F1.2 GM
Sony E Mount
Exquisite resolution and dreamy bokeh combine in a masterful f/1.2 prime.
$1,999
Launch priceReleased Mar 2021
20mm F1.4 DG DN Art is 1.4 years newer.
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Wins
20mm F1.4 DG DN Art
Wins
FE 50mm F1.2 GM
1 categories tied
TL;DR — Key differences
- A20mm F1.4 DG DN Art has lower Weight (335 g vs 778 g)
- A20mm F1.4 DG DN Art has lower Min focus distance (30 cm vs 40 cm)
- BFE 50mm F1.2 GM has lower Max aperture (Wide) (f/1.2 vs f/1.4)
- BFE 50mm F1.2 GM has lower Max aperture (Tele) (f/1.2 vs f/1.4)
- BFE 50mm F1.2 GM has higher Max magnification (0.17 × vs 0.15 ×)
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 20mm F1.4 DG DN Art
- ✓
Special elements
Adds Aspherical, ED
- ✓
Weight
335 g vs 778 g — lower is better
- ✓
Min focus distance
30 cm vs 40 cm — lower is better
- ✓
Length
97 mm vs 108 mm — lower is better
- ✓
Diameter
86 mm vs 87 mm — lower is better
Reasons to choose the FE 50mm F1.2 GM
- ✓
Special elements
Adds 3 XA (extreme aspherical)
- ✓
Control ring
Only FE 50mm F1.2 GM supports it
- ✓
Custom function button
Only FE 50mm F1.2 GM supports it
- ✓
Max aperture (Wide)
f/1.2 vs f/1.4 — lower is better
- ✓
Max aperture (Tele)
f/1.2 vs f/1.4 — lower is better
- ✓
Max magnification
0.17 × vs 0.15 × — higher is better
Shared specifications
Internal focus
Both support internal focus
Weather sealing
Both support weather sealing
Pros & cons at a glance
Editorially curated highlights and trade-offs.
20mm F1.4 DG DN Art
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
- ✓Lightweight design easy to carry all day
Cons
- –Third-party or older alternatives may offer better value
FE 50mm F1.2 GM
Pros
- ✓Outstanding sharpness wide open at f/1.2
- ✓Stunningly smooth, circular bokeh with 11 aperture blades
- ✓Extremely quiet and fast autofocus tracking
- ✓Manageable size and weight for an f/1.2 lens
Cons
- –Expensive investment for a single focal length
- –Heavy compared to standard f/1.8 options
- –Some visible vignetting wide open
Decided which one is right for you?
Compare live prices for the 20mm F1.4 DG DN Art and FE 50mm F1.2 GM at major authorized retailers.
Sigma 20mm F1.4 DG DN Art
Sony FE 50mm F1.2 GM
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.