OM System
M.Zuiko Digital ED 25mm F1.2 PRO
Micro Four Thirds Mount
50mm-equiv. F1.2 standard prime with 19-element design, 30 cm close focus, and IPX1 weather sealing.
$1,199
Launch priceReleased Nov 2017
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
FE 300mm F2.8 GM OSS is 6.2 years newer.
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Wins
M.Zuiko Digital ED 25mm F1.2 PRO
Wins
FE 300mm F2.8 GM OSS
Which would you choose?
TL;DR — Key differences
- BFE 300mm F2.8 GM OSS has higher OIS effectiveness (5 stops vs 0 stops)
- AM.Zuiko Digital ED 25mm F1.2 PRO has lower Min focus distance (30 cm vs 200 cm)
- AM.Zuiko Digital ED 25mm F1.2 PRO has lower Weight (410 g vs 1470 g)
- AM.Zuiko Digital ED 25mm F1.2 PRO has lower Length (87 mm vs 265 mm)
- AM.Zuiko Digital ED 25mm F1.2 PRO 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 share
M.Zuiko Digital ED 25mm F1.2 PRO
⌀70 × 87 mm
410 g (0.90 lb / 14.46 oz)
Credit card
85.6 × 54 mm
for scale
FE 300mm F2.8 GM OSS
⌀124 × 265 mm
1470 g (3.24 lb / 51.85 oz)
M.Zuiko Digital ED 25mm F1.2 PRO is 178mm shorter and 54mm narrower than FE 300mm F2.8 GM OSS.
M.Zuiko Digital ED 25mm F1.2 PRO is 1060 g lighter than FE 300mm F2.8 GM OSS.
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 M.Zuiko Digital ED 25mm F1.2 PRO
- ✓
Special elements
Adds 1 Aspherical, 1 DSA, 3 ED…
- ✓
Min focus distance
30 cm vs 200 cm — lower is better
- ✓
Weight
410 g vs 1470 g — lower is better
- ✓
Length
87 mm vs 265 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
70 mm vs 124 mm — lower is better
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
- ✓
Custom function button
Only FE 300mm F2.8 GM OSS supports it
- ✓
Max magnification
0.16 × vs 0.11 × — higher 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.
M.Zuiko Digital ED 25mm F1.2 PRO
Pros
- ✓Bright f/1.2 aperture for low light and subject separation
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Weather-sealed construction for outdoor shooting
Cons
- –Third-party or older alternatives may offer better value
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
Decided which one is right for you?
Compare live prices for the M.Zuiko Digital ED 25mm F1.2 PRO and FE 300mm F2.8 GM OSS at major authorized retailers.
OM System M.Zuiko Digital ED 25mm F1.2 PRO
Sony FE 300mm F2.8 GM OSS
Affiliate disclosure: As an Amazon Associate, Cameraegg earns from qualifying purchases. Cameraegg may also earn commission from B&H links, at no extra cost to you.
Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.