Canon
RF 50mm F1.2L USM
Canon RF Mount
Flagship RF 50mm f/1.2 L prime with Ring USM, 15-element design, and weather-sealed L-series build.
$2,299
Launch priceReleased Dec 2018
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
RF 50mm F1.2L USM is 2 months newer.
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Wins
RF 50mm F1.2L USM
Wins
LEICA DG SUMMILUX 25mm F1.4 II
1 categories tied
Which would you choose?
TL;DR — Key differences
- BLEICA DG SUMMILUX 25mm F1.4 II has lower Weight (265 g vs 950 g)
- BLEICA DG SUMMILUX 25mm F1.4 II has lower Min focus distance (30 cm vs 40 cm)
- BLEICA DG SUMMILUX 25mm F1.4 II has lower Diameter (70 mm vs 89.8 mm)
- ARF 50mm F1.2L USM has higher Max magnification (0.19 × vs 0.15 ×)
- BLEICA DG SUMMILUX 25mm F1.4 II has lower Length (87 mm vs 108 mm)
Key specs at a glance
Size and weight, to scale
📸 Snap this lens size diff to share
RF 50mm F1.2L USM
⌀90 × 108 mm
950 g (2.09 lb / 33.51 oz)
Credit card
85.6 × 54 mm
for scale
LEICA DG SUMMILUX 25mm F1.4 II
⌀70 × 87 mm
265 g (0.58 lb / 9.35 oz)
RF 50mm F1.2L USM is 21mm longer and 20mm wider than LEICA DG SUMMILUX 25mm F1.4 II.
RF 50mm F1.2L USM is 685 g heavier than LEICA DG SUMMILUX 25mm F1.4 II.
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 RF 50mm F1.2L USM
- ✓
Special elements
Adds 1 UD, 1 Aspherical
- ✓
Weather sealing
Only RF 50mm F1.2L USM supports it
- ✓
Control ring
Only RF 50mm F1.2L USM supports it
- ✓
Max aperture (Wide)
f/1.2 vs f/1.4 — lower is better
- ✓
Max aperture (Tele)
f/1.2 vs f/1.4 — lower is better
- ✓
Max magnification
0.19 × vs 0.15 × — higher is better
Reasons to choose the LEICA DG SUMMILUX 25mm F1.4 II
- ✓
Special elements
Adds Aspherical, ED
- ✓
Weight
265 g vs 950 g — lower is better
- ✓
Min focus distance
30 cm vs 40 cm — lower is better
- ✓
Diameter
70 mm vs 89.8 mm — lower is better
- ✓
Length
87 mm vs 108 mm — lower is better
Shared specifications
Internal focus
Both support internal focus
Pros & cons at a glance
Editorially curated highlights and trade-offs.
RF 50mm F1.2L USM
Pros
- ✓Stunning sharpness even wide open at f/1.2
- ✓Beautiful, smooth bokeh with 10 rounded aperture blades
- ✓Fast and accurate Dual Pixel AF with Ring USM
- ✓Weather-sealed L-series construction
Cons
- –Heavy for a 50mm prime (950g)
- –Premium price for a single focal length
- –No optical image stabilization
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
Decided which one is right for you?
Compare live prices for the RF 50mm F1.2L USM and LEICA DG SUMMILUX 25mm F1.4 II at major authorized retailers.
Canon RF 50mm F1.2L USM
Panasonic LEICA DG SUMMILUX 25mm F1.4 II
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed July 2026.