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
Sony
FE 600mm F4 GM OSS
Sony E Mount
3040g 600mm F4 G Master with XD Linear AF, OSS, and fluorite/ED optics.
$12,999
Launch priceReleased Apr 2021
FE 600mm F4 GM OSS is 2.3 years newer.
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Wins
RF 50mm F1.2L USM
Wins
FE 600mm F4 GM OSS
Which would you choose?
TL;DR — Key differences
- BFE 600mm F4 GM OSS has higher OIS effectiveness (5 stops vs 0 stops)
- ARF 50mm F1.2L USM has lower Min focus distance (40 cm vs 450 cm)
- ARF 50mm F1.2L USM has lower Length (108 mm vs 368 mm)
- ARF 50mm F1.2L USM has lower Max aperture (Wide) (f/1.2 vs f/4)
- ARF 50mm F1.2L USM has lower Max aperture (Tele) (f/1.2 vs f/4)
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
FE 600mm F4 GM OSS
⌀160 × 368 mm
3040 g (6.70 lb / 107.23 oz)
RF 50mm F1.2L USM is 260mm shorter and 70mm narrower than FE 600mm F4 GM OSS.
RF 50mm F1.2L USM is 2090 g lighter than FE 600mm F4 GM OSS.
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 450 cm — lower is better
- ✓
Length
108 mm vs 368 mm — lower is better
- ✓
Max aperture (Wide)
f/1.2 vs f/4 — lower is better
- ✓
Max aperture (Tele)
f/1.2 vs f/4 — lower is better
- ✓
Weight
950 g vs 3040 g — lower is better
- ✓
Diameter
89.8 mm vs 160 mm — lower is better
- ✓
Max magnification
0.19 × vs 0.14 × — higher is better
Reasons to choose the FE 600mm F4 GM OSS
- ✓
Special elements
Adds 2 Fluorite, 2 ED
- ✓
OIS effectiveness
5 stops vs 0 stops — higher is better
- ✓
Optical stabilization
Only FE 600mm F4 GM OSS supports it
- ✓
Custom function button
Only FE 600mm F4 GM OSS supports it
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
FE 600mm F4 GM OSS
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 FE 600mm F4 GM OSS at major authorized retailers.
Canon RF 50mm F1.2L USM
Sony FE 600mm F4 GM OSS
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.