Canon
RF 50mm F1.2L USM
Canon RF Mount
Canon's flagship 50mm f/1.2 prime — extraordinary resolution and creamy bokeh for portraits and low light.
$2,299
Launch priceReleased Dec 2018
Canon
RF-S 10-18mm F4.5-6.3 IS STM
Canon RF Mount
RF-S 10-18mm F4.5-6.3 IS STM — 10–18mm f/4.5-6.3 for Canon RF, a popular choice in the canon lineup.
$329
Launch priceReleased Apr 2024
RF-S 10-18mm F4.5-6.3 IS STM is 5.3 years newer.
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Wins
RF 50mm F1.2L USM
Wins
RF-S 10-18mm F4.5-6.3 IS STM
TL;DR — Key differences
- BRF-S 10-18mm F4.5-6.3 IS STM has higher OIS effectiveness (4 stops vs 0 stops)
- BRF-S 10-18mm F4.5-6.3 IS STM has lower Weight (165 g vs 950 g)
- ARF 50mm F1.2L USM has lower Max aperture (Tele) (f/1.2 vs f/6.3)
- ARF 50mm F1.2L USM has lower Max aperture (Wide) (f/1.2 vs f/4.5)
- BRF-S 10-18mm F4.5-6.3 IS STM has lower Min focus distance (15 cm vs 40 cm)
Key specs at a glance
Size and weight, to scale
RF 50mm F1.2L USM
⌀89 × 108 mm
950 g (2.09 lb / 33.51 oz)
Credit card
85.6 × 54 mm
for scale
RF-S 10-18mm F4.5-6.3 IS STM
⌀69 × 45 mm
165 g (0.36 lb / 5.82 oz)
RF 50mm F1.2L USM is 63mm longer and 20mm wider than RF-S 10-18mm F4.5-6.3 IS STM.
RF 50mm F1.2L USM is 785 g heavier than RF-S 10-18mm F4.5-6.3 IS STM.
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
- ✓
Max aperture (Tele)
f/1.2 vs f/6.3 — lower is better
- ✓
Max aperture (Wide)
f/1.2 vs f/4.5 — lower is better
- ✓
Weather sealing
Only RF 50mm F1.2L USM supports it
- ✓
Control ring
Only RF 50mm F1.2L USM supports it
- ✓
Max magnification
0.19 × vs 0.17 × — higher is better
Reasons to choose the RF-S 10-18mm F4.5-6.3 IS STM
- ✓
OIS effectiveness
4 stops vs 0 stops — higher is better
- ✓
Weight
165 g vs 950 g — lower is better
- ✓
Min focus distance
15 cm vs 40 cm — lower is better
- ✓
Length
44.6 mm vs 108 mm — lower is better
- ✓
Optical stabilization
Only RF-S 10-18mm F4.5-6.3 IS STM supports it
- ✓
Diameter
69.2 mm vs 89 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 9 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
RF-S 10-18mm F4.5-6.3 IS STM
Pros
- ✓Versatile zoom range covers multiple focal lengths in one lens
- ✓Built-in optical image stabilization
- ✓Lightweight design easy to carry all day
Cons
- –Slower maximum aperture limits low-light performance
- –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 RF-S 10-18mm F4.5-6.3 IS STM at major authorized retailers.
Canon RF 50mm F1.2L USM
Canon RF-S 10-18mm F4.5-6.3 IS STM
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.