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 12mm F2
Micro Four Thirds Mount
M.Zuiko Digital ED 12mm F2 — 12mm f/2 for Micro Four Thirds, a popular choice in the om-system lineup.
$799
Launch priceReleased Jun 2012
RF 50mm F1.2L USM is 6.4 years newer.
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Wins
RF 50mm F1.2L USM
Wins
M.Zuiko Digital ED 12mm F2
1 categories tied
Which would you choose?
TL;DR — Key differences
- BM.Zuiko Digital ED 12mm F2 has lower Weight (130 g vs 950 g)
- BM.Zuiko Digital ED 12mm F2 has lower Length (43 mm vs 108 mm)
- ARF 50mm F1.2L USM has higher Max magnification (0.19 × vs 0.08 ×)
- BM.Zuiko Digital ED 12mm F2 has lower Min focus distance (20 cm vs 40 cm)
- ARF 50mm F1.2L USM has lower Max aperture (Wide) (f/1.2 vs f/2)
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 12mm F2
⌀56 × 43 mm
130 g (0.29 lb / 4.59 oz)
RF 50mm F1.2L USM is 65mm longer and 34mm wider than M.Zuiko Digital ED 12mm F2.
RF 50mm F1.2L USM is 820 g heavier than M.Zuiko Digital ED 12mm F2.
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
- ✓
Control ring
Only RF 50mm F1.2L USM supports it
- ✓
Max aperture (Wide)
f/1.2 vs f/2 — lower is better
- ✓
Max aperture (Tele)
f/1.2 vs f/2 — lower is better
- ✓
Max magnification
0.19 × vs 0.08 × — higher is better
Reasons to choose the M.Zuiko Digital ED 12mm F2
- ✓
Weight
130 g vs 950 g — lower is better
- ✓
Special elements
Adds 1 ED, 1 Super ED
- ✓
Length
43 mm vs 108 mm — lower is better
- ✓
Min focus distance
20 cm vs 40 cm — lower is better
- ✓
Diameter
56 mm vs 89.8 mm — 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.
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 12mm F2
Pros
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Lightweight design easy to carry all day
- ✓Native Micro Four Thirds mount compatibility
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 12mm F2 at major authorized retailers.
Canon RF 50mm F1.2L USM
OM System M.Zuiko Digital ED 12mm F2
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.