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
Canon
RF 800mm F5.6 L IS USM
Canon RF Mount
800mm super-telephoto with built-in 1.4× extender (1120mm F8) and Dual Nano USM autofocus.
$16,999
Launch priceReleased Apr 2022
RF 800mm F5.6 L IS USM is 3.3 years newer.
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Wins
RF 50mm F1.2L USM
Wins
RF 800mm F5.6 L IS USM
Which would you choose?
TL;DR — Key differences
- BRF 800mm F5.6 L IS USM has higher OIS effectiveness (5.5 stops vs 0 stops)
- ARF 50mm F1.2L USM has lower Min focus distance (40 cm vs 260 cm)
- ARF 50mm F1.2L USM has lower Max aperture (Wide) (f/1.2 vs f/5.6)
- ARF 50mm F1.2L USM has lower Max aperture (Tele) (f/1.2 vs f/5.6)
- ARF 50mm F1.2L USM has lower Length (108 mm vs 432 mm)
Key specs at a glance
Size and weight, to scale
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RF 50mm F1.2L USM
⌀90 × 108 mm
950 g (2.09 lb / 33.51 oz)
Credit card
85.6 × 54 mm
for scale
RF 800mm F5.6 L IS USM
⌀163 × 432 mm
3140 g (6.92 lb / 110.76 oz)
RF 50mm F1.2L USM is 324mm shorter and 73mm narrower than RF 800mm F5.6 L IS USM.
RF 50mm F1.2L USM is 2190 g lighter than RF 800mm F5.6 L IS USM.
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
- ✓
Min focus distance
40 cm vs 260 cm — lower is better
- ✓
Max aperture (Wide)
f/1.2 vs f/5.6 — lower is better
- ✓
Max aperture (Tele)
f/1.2 vs f/5.6 — lower is better
- ✓
Length
108 mm vs 432 mm — lower is better
- ✓
Weight
950 g vs 3140 g — lower is better
- ✓
Special elements
Adds 1 UD
- ✓
Diameter
89.8 mm vs 163 mm — lower is better
Reasons to choose the RF 800mm F5.6 L IS USM
- ✓
OIS effectiveness
5.5 stops vs 0 stops — higher is better
- ✓
Special elements
Adds 2 Fluorite, 2 UD
- ✓
Optical stabilization
Only RF 800mm F5.6 L IS USM supports it
- ✓
Custom function button
Only RF 800mm F5.6 L IS USM supports it
- ✓
Max magnification
0.34 × vs 0.19 × — higher is better
Shared specifications
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
RF 800mm F5.6 L IS USM
Pros
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Built-in optical image stabilization
- ✓Weather-sealed construction for outdoor shooting
Cons
- –Premium price point
- –Relatively heavy for extended handheld use
- –Slower maximum aperture limits low-light performance
Decided which one is right for you?
Compare live prices for the RF 50mm F1.2L USM and RF 800mm F5.6 L IS USM at major authorized retailers.
Canon RF 50mm F1.2L USM
Canon RF 800mm F5.6 L IS USM
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed October 2026.