Panasonic
LEICA DG SUMMILUX 25mm F1.4 II
Micro Four Thirds Mount
LEICA DG SUMMILUX 25mm F1.4 II — 25mm f/1.4 for Micro Four Thirds, a popular choice in the panasonic lineup.
$699
Launch priceReleased Oct 2018
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 5.3 years newer.
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Wins
LEICA DG SUMMILUX 25mm F1.4 II
Wins
FE 300mm F2.8 GM OSS
TL;DR — Key differences
- BFE 300mm F2.8 GM OSS has higher OIS effectiveness (5 stops vs 0 stops)
- ALEICA DG SUMMILUX 25mm F1.4 II has lower Min focus distance (30 cm vs 200 cm)
- ALEICA DG SUMMILUX 25mm F1.4 II has lower Weight (265 g vs 1470 g)
- ALEICA DG SUMMILUX 25mm F1.4 II has lower Length (87 mm vs 265 mm)
- ALEICA DG SUMMILUX 25mm F1.4 II has lower Max aperture (Wide) (f/1.4 vs f/2.8)
Key specs at a glance
Size and weight, to scale
LEICA DG SUMMILUX 25mm F1.4 II
⌀70 × 87 mm
265 g (0.58 lb / 9.35 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)
LEICA DG SUMMILUX 25mm F1.4 II is 178mm shorter and 54mm narrower than FE 300mm F2.8 GM OSS.
LEICA DG SUMMILUX 25mm F1.4 II is 1205 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 LEICA DG SUMMILUX 25mm F1.4 II
- ✓
Special elements
Adds Aspherical, ED
- ✓
Min focus distance
30 cm vs 200 cm — lower is better
- ✓
Weight
265 g vs 1470 g — lower is better
- ✓
Length
87 mm vs 265 mm — lower is better
- ✓
Max aperture (Wide)
f/1.4 vs f/2.8 — lower is better
- ✓
Max aperture (Tele)
f/1.4 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
- ✓
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
Shared specifications
Internal focus
Both support internal focus
Pros & cons at a glance
Editorially curated highlights and trade-offs.
LEICA DG SUMMILUX 25mm F1.4 II
Pros
- ✓Bright f/1.4 aperture for low light and subject separation
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Lightweight design easy to carry all day
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 LEICA DG SUMMILUX 25mm F1.4 II and FE 300mm F2.8 GM OSS at major authorized retailers.
Panasonic LEICA DG SUMMILUX 25mm F1.4 II
Sony FE 300mm F2.8 GM OSS
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.