Panasonic
LUMIX S PRO 50mm F1.4
Leica L Mount
LUMIX S PRO 50mm F1.4 — 50mm f/1.4 for Leica L, a popular choice in the panasonic lineup.
$2,299
Launch priceReleased Oct 2019
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 4.3 years newer.
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Wins
LUMIX S PRO 50mm F1.4
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)
- ALUMIX S PRO 50mm F1.4 has lower Min focus distance (30 cm vs 200 cm)
- ALUMIX S PRO 50mm F1.4 has lower Max aperture (Wide) (f/1.4 vs f/2.8)
- ALUMIX S PRO 50mm F1.4 has lower Max aperture (Tele) (f/1.4 vs f/2.8)
- ALUMIX S PRO 50mm F1.4 has lower Weight (958 g vs 1470 g)
Key specs at a glance
Size and weight, to scale
LUMIX S PRO 50mm F1.4
⌀81 × 184 mm
958 g (2.11 lb / 33.79 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)
LUMIX S PRO 50mm F1.4 is 81mm shorter and 43mm narrower than FE 300mm F2.8 GM OSS.
LUMIX S PRO 50mm F1.4 is 512 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 LUMIX S PRO 50mm F1.4
- ✓
Special elements
Adds Aspherical, ED
- ✓
Min focus distance
30 cm vs 200 cm — 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
- ✓
Weight
958 g vs 1470 g — lower is better
- ✓
Diameter
81 mm vs 124 mm — lower is better
- ✓
Length
184 mm vs 265 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
- ✓
Max magnification
0.16 × vs 0.15 × — 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.
LUMIX S PRO 50mm F1.4
Pros
- ✓Bright f/1.4 aperture for low light and subject separation
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Weather-sealed construction for outdoor shooting
Cons
- –Premium price point
- –Relatively heavy for extended handheld use
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 LUMIX S PRO 50mm F1.4 and FE 300mm F2.8 GM OSS at major authorized retailers.
Panasonic LUMIX S PRO 50mm F1.4
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.