Panasonic
LUMIX S 18mm F1.8
Leica L Mount
LUMIX S 18mm F1.8 — 18mm f/1.8 for Leica L, a popular choice in the panasonic lineup.
$599
Launch priceReleased Nov 2022
Sony
FE 50mm F1.4 GM
Sony E Mount
FE 50mm F1.4 GM — 50mm f/1.4 for Sony E, a popular choice in the sony lineup.
$1,799
Launch priceReleased Mar 2025
FE 50mm F1.4 GM is 2.3 years newer.
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Wins
LUMIX S 18mm F1.8
Wins
FE 50mm F1.4 GM
1 categories tied
Which would you choose?
TL;DR — Key differences
- ALUMIX S 18mm F1.8 has lower Weight (340 g vs 580 g)
- ALUMIX S 18mm F1.8 has lower Length (86.5 mm vs 131 mm)
- ALUMIX S 18mm F1.8 has lower Min focus distance (20 cm vs 30 cm)
- ALUMIX S 18mm F1.8 has higher Max magnification (0.2 × vs 0.15 ×)
- BFE 50mm F1.4 GM has lower Max aperture (Wide) (f/1.4 vs f/1.8)
Key specs at a glance
Size and weight, to scale
📸 Snap this lens size diff to shareLUMIX S 18mm F1.8
⌀67 × 87 mm
340 g (0.75 lb / 11.99 oz)
Credit card
85.6 × 54 mm
for scale
FE 50mm F1.4 GM
⌀81 × 131 mm
580 g (1.28 lb / 20.46 oz)
LUMIX S 18mm F1.8 is 45mm shorter and 14mm narrower than FE 50mm F1.4 GM.
LUMIX S 18mm F1.8 is 240 g lighter than FE 50mm F1.4 GM.
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 18mm F1.8
- ✓
Special elements
Adds 2 Aspherical, 1 ED
- ✓
Weight
340 g vs 580 g — lower is better
- ✓
Length
86.5 mm vs 131 mm — lower is better
- ✓
Min focus distance
20 cm vs 30 cm — lower is better
- ✓
Diameter
67 mm vs 81 mm — lower is better
- ✓
Max magnification
0.2 × vs 0.15 × — higher is better
Reasons to choose the FE 50mm F1.4 GM
- ✓
Special elements
Adds Aspherical, ED
- ✓
Control ring
Only FE 50mm F1.4 GM supports it
- ✓
Custom function button
Only FE 50mm F1.4 GM supports it
- ✓
Max aperture (Wide)
f/1.4 vs f/1.8 — lower is better
- ✓
Max aperture (Tele)
f/1.4 vs f/1.8 — lower is better
Shared specifications
Internal focus
Both support internal focus
Weather sealing
Both support weather sealing
Pros & cons at a glance
Editorially curated highlights and trade-offs.
LUMIX S 18mm F1.8
Pros
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Lightweight design easy to carry all day
- ✓Native Leica L mount compatibility
Cons
- –Third-party or older alternatives may offer better value
FE 50mm F1.4 GM
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
- –Third-party or older alternatives may offer better value
Decided which one is right for you?
Compare live prices for the LUMIX S 18mm F1.8 and FE 50mm F1.4 GM at major authorized retailers.
Panasonic LUMIX S 18mm F1.8
Sony FE 50mm F1.4 GM
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.