Sony
FE 300mm F2.8 GM OSS
Sony E Mount
World's lightest 300mm F2.8 — 1470g with XD Linear AF, OSS, and G Master resolution.
$6,999
Launch priceReleased Jan 2024
Viltrox
AF 56mm F1.2 Pro XF
Fujifilm X Mount
AF 56mm F1.2 Pro XF — 56mm f/1.2 for Fujifilm X, a popular choice in the viltrox lineup.
$729
Launch priceReleased May 2023
FE 300mm F2.8 GM OSS is 8 months newer.
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Wins
FE 300mm F2.8 GM OSS
Wins
AF 56mm F1.2 Pro XF
Which would you choose?
TL;DR — Key differences
- AFE 300mm F2.8 GM OSS has higher OIS effectiveness (5 stops vs 0 stops)
- BAF 56mm F1.2 Pro XF has lower Min focus distance (50 cm vs 200 cm)
- BAF 56mm F1.2 Pro XF has lower Length (99 mm vs 265 mm)
- BAF 56mm F1.2 Pro XF has lower Weight (595 g vs 1470 g)
- BAF 56mm F1.2 Pro XF 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 300mm F2.8 GM OSS
⌀124 × 265 mm
1470 g (3.24 lb / 51.85 oz)
Credit card
85.6 × 54 mm
for scale
AF 56mm F1.2 Pro XF
⌀76 × 99 mm
595 g (1.31 lb / 20.99 oz)
FE 300mm F2.8 GM OSS is 166mm longer and 48mm wider than AF 56mm F1.2 Pro XF.
FE 300mm F2.8 GM OSS is 875 g heavier than AF 56mm F1.2 Pro XF.
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 300mm F2.8 GM OSS
- ✓
Special elements
Adds 3 Super ED, 1 ED
- ✓
OIS effectiveness
5 stops vs 0 stops — higher is better
- ✓
Optical stabilization
Only FE 300mm F2.8 GM OSS supports it
- ✓
Control ring
Only FE 300mm F2.8 GM OSS supports it
- ✓
Custom function button
Only FE 300mm F2.8 GM OSS supports it
- ✓
Max magnification
0.16 × vs 0.1 × — higher is better
Reasons to choose the AF 56mm F1.2 Pro XF
- ✓
Special elements
Adds 1 Aspherical, 2 ED, 2 HR
- ✓
Min focus distance
50 cm vs 200 cm — lower is better
- ✓
Length
99 mm vs 265 mm — lower is better
- ✓
Weight
595 g vs 1470 g — 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
76 mm vs 124 mm — lower 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.
FE 300mm 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
AF 56mm F1.2 Pro XF
Pros
- ✓Bright f/1.2 aperture for low light and subject separation
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Native Fujifilm X mount compatibility
Cons
- –Third-party or older alternatives may offer better value
Decided which one is right for you?
Compare live prices for the FE 300mm F2.8 GM OSS and AF 56mm F1.2 Pro XF at major authorized retailers.
Sony FE 300mm F2.8 GM OSS
Viltrox AF 56mm F1.2 Pro XF
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.