Leica
Summicron-SL 50mm f/2 ASPH.
Leica L Mount
Summicron-SL 50mm f/2 ASPH. — 50mm f/2 for Leica L, a popular choice in the leica lineup.
$2,195
Launch priceReleased Oct 2016
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 7.3 years newer.
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Wins
Summicron-SL 50mm f/2 ASPH.
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)
- ASummicron-SL 50mm f/2 ASPH. has lower Min focus distance (50 cm vs 200 cm)
- ASummicron-SL 50mm f/2 ASPH. has lower Length (89 mm vs 265 mm)
- ASummicron-SL 50mm f/2 ASPH. has lower Weight (580 g vs 1470 g)
- ASummicron-SL 50mm f/2 ASPH. has lower Diameter (73 mm vs 124 mm)
Key specs at a glance
Size and weight, to scale
Summicron-SL 50mm f/2 ASPH.
⌀73 × 89 mm
580 g (1.28 lb / 20.46 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)
Summicron-SL 50mm f/2 ASPH. is 176mm shorter and 51mm narrower than FE 300mm F2.8 GM OSS.
Summicron-SL 50mm f/2 ASPH. is 890 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 Summicron-SL 50mm f/2 ASPH.
- ✓
Special elements
Adds 2 Aspherical
- ✓
Min focus distance
50 cm vs 200 cm — lower is better
- ✓
Length
89 mm vs 265 mm — lower is better
- ✓
Weight
580 g vs 1470 g — lower is better
- ✓
Diameter
73 mm vs 124 mm — lower is better
- ✓
Max aperture (Wide)
f/2 vs f/2.8 — lower is better
- ✓
Max aperture (Tele)
f/2 vs f/2.8 — lower is better
- ✓
Max magnification
0.2 × vs 0.16 × — higher 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
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.
Summicron-SL 50mm f/2 ASPH.
Pros
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Weather-sealed construction for outdoor shooting
- ✓Native Leica L mount compatibility
Cons
- –Premium price point
- –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 Summicron-SL 50mm f/2 ASPH. and FE 300mm F2.8 GM OSS at major authorized retailers.
Leica Summicron-SL 50mm f/2 ASPH.
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.