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
Sigma
85mm F1.4 DG DN Art
Leica L Mount
85mm F1.4 DG DN Art — 85mm f/1.4 for Leica L, a popular choice in the sigma lineup.
$1,199
Launch priceReleased Aug 2021
85mm F1.4 DG DN Art is 2.7 years newer.
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Wins
RF 50mm F1.2L USM
Wins
85mm F1.4 DG DN Art
1 categories tied
TL;DR — Key differences
- ARF 50mm F1.2L USM has lower Min focus distance (40 cm vs 85 cm)
- ARF 50mm F1.2L USM has higher Max magnification (0.19 × vs 0.12 ×)
- B85mm F1.4 DG DN Art has lower Weight (642 g vs 950 g)
- ARF 50mm F1.2L USM has lower Max aperture (Wide) (f/1.2 vs f/1.4)
- ARF 50mm F1.2L USM has lower Max aperture (Tele) (f/1.2 vs f/1.4)
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
85mm F1.4 DG DN Art
⌀79 × 96 mm
642 g (1.42 lb / 22.65 oz)
RF 50mm F1.2L USM is 12mm longer and 10mm wider than 85mm F1.4 DG DN Art.
RF 50mm F1.2L USM is 308 g heavier than 85mm F1.4 DG DN Art.
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
- ✓
Min focus distance
40 cm vs 85 cm — lower is better
- ✓
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 0.12 × — higher is better
Reasons to choose the 85mm F1.4 DG DN Art
- ✓
Special elements
Adds 1 SLD, 3 Aspherical
- ✓
Weight
642 g vs 950 g — lower is better
- ✓
Diameter
78.9 mm vs 89 mm — lower is better
- ✓
Length
96.1 mm vs 108 mm — lower 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 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
85mm F1.4 DG DN Art
Pros
- ✓Bright f/1.4 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 85mm F1.4 DG DN Art at major authorized retailers.
Canon RF 50mm F1.2L USM
Sigma 85mm F1.4 DG DN Art
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.