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
OM System
M.Zuiko Digital ED 25mm F1.2 PRO
Micro Four Thirds Mount
50mm-equiv. F1.2 standard prime with 19-element design, 30 cm close focus, and IPX1 weather sealing.
$1,199
Launch priceReleased Nov 2017
RF 50mm F1.2L USM is 1.1 years newer.
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Wins
RF 50mm F1.2L USM
Wins
M.Zuiko Digital ED 25mm F1.2 PRO
3 categories tied
Which would you choose?
TL;DR — Key differences
- BM.Zuiko Digital ED 25mm F1.2 PRO has lower Weight (410 g vs 950 g)
- ARF 50mm F1.2L USM has higher Max magnification (0.19 × vs 0.11 ×)
- BM.Zuiko Digital ED 25mm F1.2 PRO has lower Min focus distance (30 cm vs 40 cm)
- BM.Zuiko Digital ED 25mm F1.2 PRO has lower Diameter (70 mm vs 89.8 mm)
- BM.Zuiko Digital ED 25mm F1.2 PRO 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
M.Zuiko Digital ED 25mm F1.2 PRO
⌀70 × 87 mm
410 g (0.90 lb / 14.46 oz)
RF 50mm F1.2L USM is 21mm longer and 20mm wider than M.Zuiko Digital ED 25mm F1.2 PRO.
RF 50mm F1.2L USM is 540 g heavier than M.Zuiko Digital ED 25mm F1.2 PRO.
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
- ✓
Max magnification
0.19 × vs 0.11 × — higher is better
Reasons to choose the M.Zuiko Digital ED 25mm F1.2 PRO
- ✓
Special elements
Adds 1 DSA, 3 ED, 1 Super ED
- ✓
Weight
410 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
Max aperture (Wide)
Both f/1.2
Max aperture (Tele)
Both f/1.2
Internal focus
Both support internal focus
Weather sealing
Both support weather sealing
Control ring
Both support control ring
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
M.Zuiko Digital ED 25mm F1.2 PRO
Pros
- ✓Bright f/1.2 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 RF 50mm F1.2L USM and M.Zuiko Digital ED 25mm F1.2 PRO at major authorized retailers.
Canon RF 50mm F1.2L USM
OM System M.Zuiko Digital ED 25mm F1.2 PRO
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.