Panasonic
LUMIX S 100-400mm F5-6.3
Leica L Mount
LUMIX S 100-400mm F5-6.3 — 100–400mm f/5-6.3 for Leica L, a popular choice in the panasonic lineup.
$1,299
Launch priceReleased Jan 2024
Sony
FE 50mm F1.2 GM
Sony E Mount
Exquisite resolution and dreamy bokeh combine in a masterful f/1.2 prime.
$1,999
Launch priceReleased Mar 2021
LUMIX S 100-400mm F5-6.3 is 2.8 years newer.
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Wins
LUMIX S 100-400mm F5-6.3
Wins
FE 50mm F1.2 GM
Which would you choose?
TL;DR — Key differences
- ALUMIX S 100-400mm F5-6.3 has higher OIS effectiveness (5.5 stops vs 0 stops)
- BFE 50mm F1.2 GM has lower Max aperture (Tele) (f/1.2 vs f/6.3)
- BFE 50mm F1.2 GM has lower Max aperture (Wide) (f/1.2 vs f/5)
- BFE 50mm F1.2 GM has lower Min focus distance (40 cm vs 130 cm)
- BFE 50mm F1.2 GM has lower Length (108 mm vs 205.5 mm)
Key specs at a glance
Size and weight, to scale
📸 Snap this lens size diff to shareLUMIX S 100-400mm F5-6.3
⌀83 × 206 mm
985 g (2.17 lb / 34.74 oz)
Credit card
85.6 × 54 mm
for scale
FE 50mm F1.2 GM
⌀87 × 108 mm
778 g (1.72 lb / 27.44 oz)
LUMIX S 100-400mm F5-6.3 is 98mm longer and 4mm narrower than FE 50mm F1.2 GM.
LUMIX S 100-400mm F5-6.3 is 207 g heavier than FE 50mm F1.2 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 100-400mm F5-6.3
- ✓
Special elements
Adds 2 ED, 1 UED
- ✓
OIS effectiveness
5.5 stops vs 0 stops — higher is better
- ✓
Optical stabilization
Only LUMIX S 100-400mm F5-6.3 supports it
- ✓
Max magnification
0.25 × vs 0.17 × — higher is better
- ✓
Diameter
83 mm vs 87 mm — lower is better
Reasons to choose the FE 50mm F1.2 GM
- ✓
Special elements
Adds 3 XA (extreme aspherical)
- ✓
Max aperture (Tele)
f/1.2 vs f/6.3 — lower is better
- ✓
Max aperture (Wide)
f/1.2 vs f/5 — lower is better
- ✓
Min focus distance
40 cm vs 130 cm — lower is better
- ✓
Length
108 mm vs 205.5 mm — lower is better
- ✓
Weight
778 g vs 985 g — lower 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 100-400mm F5-6.3
Pros
- ✓Versatile zoom range covers multiple focal lengths in one lens
- ✓Built-in optical image stabilization
- ✓Weather-sealed construction for outdoor shooting
Cons
- –Relatively heavy for extended handheld use
- –Slower maximum aperture limits low-light performance
FE 50mm F1.2 GM
Pros
- ✓Outstanding sharpness wide open at f/1.2
- ✓Stunningly smooth, circular bokeh with 11 aperture blades
- ✓Extremely quiet and fast autofocus tracking
- ✓Manageable size and weight for an f/1.2 lens
Cons
- –Expensive investment for a single focal length
- –Heavy compared to standard f/1.8 options
- –Some visible vignetting wide open
Decided which one is right for you?
Compare live prices for the LUMIX S 100-400mm F5-6.3 and FE 50mm F1.2 GM at major authorized retailers.
Panasonic LUMIX S 100-400mm F5-6.3
Sony FE 50mm F1.2 GM
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.