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
Sony
FE 40mm F2.5 G
Sony E Mount
FE 40mm F2.5 G — 40mm f/2.5 for Sony E, a popular choice in the sony lineup.
$599
Launch priceReleased Apr 2021
FE 300mm F2.8 GM OSS is 2.8 years newer.
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Wins
FE 300mm F2.8 GM OSS
Wins
FE 40mm F2.5 G
Which would you choose?
TL;DR — Key differences
- AFE 300mm F2.8 GM OSS has higher OIS effectiveness (5 stops vs 0 stops)
- BFE 40mm F2.5 G has lower Weight (173 g vs 1470 g)
- BFE 40mm F2.5 G has lower Min focus distance (30 cm vs 200 cm)
- BFE 40mm F2.5 G has lower Length (74 mm vs 265 mm)
- BFE 40mm F2.5 G has lower Diameter (81 mm vs 124 mm)
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
FE 40mm F2.5 G
⌀81 × 74 mm
173 g (0.38 lb / 6.10 oz)
FE 300mm F2.8 GM OSS is 191mm longer and 43mm wider than FE 40mm F2.5 G.
FE 300mm F2.8 GM OSS is 1297 g heavier than FE 40mm F2.5 G.
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
- ✓
Weather sealing
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 0.15 × — higher is better
Reasons to choose the FE 40mm F2.5 G
- ✓
Special elements
Adds Aspherical
- ✓
Weight
173 g vs 1470 g — lower is better
- ✓
Min focus distance
30 cm vs 200 cm — lower is better
- ✓
Length
74 mm vs 265 mm — lower is better
- ✓
Diameter
81 mm vs 124 mm — lower is better
- ✓
Max aperture (Wide)
f/2.5 vs f/2.8 — lower is better
- ✓
Max aperture (Tele)
f/2.5 vs f/2.8 — lower is better
Shared specifications
Internal focus
Both support internal focus
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
FE 40mm F2.5 G
Pros
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Lightweight design easy to carry all day
- ✓Native Sony E 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 FE 40mm F2.5 G at major authorized retailers.
Sony FE 300mm F2.8 GM OSS
Sony FE 40mm F2.5 G
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.