Sony
FE 400mm F2.8 GM OSS
Sony E Mount
World's lightest 400mm F2.8 — 2895g with 3 fluorite elements, XD Linear AF, and OSS.
$12,000
Launch priceReleased Jun 2018
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 2.8 years newer.
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Wins
FE 400mm F2.8 GM OSS
Wins
FE 50mm F1.2 GM
Which would you choose?
TL;DR — Key differences
- AFE 400mm F2.8 GM OSS has higher OIS effectiveness (5 stops vs 0 stops)
- BFE 50mm F1.2 GM has lower Min focus distance (40 cm vs 270 cm)
- BFE 50mm F1.2 GM has lower Weight (778 g vs 2895 g)
- BFE 50mm F1.2 GM has lower Length (108 mm vs 359 mm)
- BFE 50mm F1.2 GM has lower Max aperture (Wide) (f/1.2 vs f/2.8)
Key specs at a glance
Size and weight, to scale
📸 Snap this lens size diff to shareFE 400mm F2.8 GM OSS
⌀158 × 359 mm
2895 g (6.38 lb / 102.12 oz)
Credit card
85.6 × 54 mm
for scale
FE 50mm F1.2 GM
⌀87 × 108 mm
778 g (1.72 lb / 27.44 oz)
FE 400mm F2.8 GM OSS is 251mm longer and 71mm wider than FE 50mm F1.2 GM.
FE 400mm F2.8 GM OSS is 2117 g heavier than FE 50mm F1.2 GM.
Diameter (⌀) is the maximum barrel width; length is measured from the mount to the front of the lens.
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 400mm F2.8 GM OSS
- ✓
Special elements
Adds 3 Fluorite, 1 ED
- ✓
OIS effectiveness
5 stops vs 0 stops — higher is better
- ✓
Optical stabilization
Only FE 400mm F2.8 GM OSS supports it
Reasons to choose the FE 50mm F1.2 GM
- ✓
Special elements
Adds 3 XA (extreme aspherical)
- ✓
Min focus distance
40 cm vs 270 cm — lower is better
- ✓
Weight
778 g vs 2895 g — lower is better
- ✓
Length
108 mm vs 359 mm — lower is better
- ✓
Max aperture (Wide)
f/1.2 vs f/2.8 — lower is better
- ✓
Max aperture (Tele)
f/1.2 vs f/2.8 — lower is better
- ✓
Diameter
87 mm vs 158.1 mm — lower is better
- ✓
Max magnification
0.17 × vs 0.16 × — higher is better
Shared specifications
Internal focus
Both support internal focus
Weather sealing
Both support weather sealing
Control ring
Both support control ring
Custom function button
Both support custom function button
Pros & cons at a glance
Editorially curated highlights and trade-offs.
FE 400mm F2.8 GM OSS
Pros
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Built-in optical image stabilization
- ✓Weather-sealed construction for outdoor shooting
Cons
- –Premium price point
- –Relatively heavy for extended handheld use
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 FE 400mm F2.8 GM OSS and FE 50mm F1.2 GM at major authorized retailers.
Sony FE 400mm F2.8 GM OSS
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 June 2026.