Sigma
100-400mm F5-6.3 DG DN OS Contemporary
Sony E Mount
100-400mm F5-6.3 DG DN OS Contemporary — 100–400mm f/5-6.3 for Sony E, a popular choice in the sigma lineup.
$949
Launch priceReleased Jul 2020
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
FE 50mm F1.2 GM is 8 months newer.
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Wins
100-400mm F5-6.3 DG DN OS Contemporary
Wins
FE 50mm F1.2 GM
TL;DR — Key differences
- A100-400mm F5-6.3 DG DN OS Contemporary has higher OIS effectiveness (5 stops vs 0 stops)
- BFE 50mm F1.2 GM has lower Max aperture (Tele) (f/1.2 vs f/6.3)
- BFE 50mm F1.2 GM has lower Max aperture (Wide) (f/1.2 vs f/5)
- BFE 50mm F1.2 GM has lower Length (108 mm vs 210 mm)
- A100-400mm F5-6.3 DG DN OS Contemporary has higher Max magnification (0.25 × vs 0.17 ×)
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 100-400mm F5-6.3 DG DN OS Contemporary
- ✓
Special elements
Adds Aspherical
- ✓
OIS effectiveness
5 stops vs 0 stops — higher is better
- ✓
Optical stabilization
Only 100-400mm F5-6.3 DG DN OS Contemporary supports it
- ✓
Max magnification
0.25 × vs 0.17 × — higher is better
- ✓
Diameter
81 mm vs 87 mm — lower is better
- ✓
Min focus distance
38 cm vs 40 cm — lower is better
Reasons to choose the FE 50mm F1.2 GM
- ✓
Special elements
Adds 3 XA (extreme aspherical)
- ✓
Max aperture (Tele)
f/1.2 vs f/6.3 — lower is better
- ✓
Max aperture (Wide)
f/1.2 vs f/5 — lower is better
- ✓
Custom function button
Only FE 50mm F1.2 GM supports it
- ✓
Length
108 mm vs 210 mm — lower is better
- ✓
Weight
778 g vs 1140 g — lower is better
Shared specifications
Internal focus
Both support internal focus
Weather sealing
Both support weather sealing
Control ring
Both support control ring
Pros & cons at a glance
Editorially curated highlights and trade-offs.
100-400mm F5-6.3 DG DN OS Contemporary
Pros
- ✓Versatile zoom range covers multiple focal lengths in one lens
- ✓Built-in optical image stabilization
- ✓Weather-sealed construction for outdoor shooting
Cons
- –Relatively heavy for extended handheld use
- –Slower maximum aperture limits low-light performance
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 100-400mm F5-6.3 DG DN OS Contemporary and FE 50mm F1.2 GM at major authorized retailers.
Sigma 100-400mm F5-6.3 DG DN OS Contemporary
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.