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
Sony
FE 300mm F4.5-5.6 G OSS
Sony E Mount
Compact 300mm full-frame telephoto at 1640g with 5.5-stop OSS and linear AF.
$1,399
Launch priceReleased Sep 2024
FE 300mm F4.5-5.6 G OSS is 5.8 years newer.
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Wins
RF 50mm F1.2L USM
Wins
FE 300mm F4.5-5.6 G OSS
1 categories tied
TL;DR — Key differences
- BFE 300mm F4.5-5.6 G OSS has higher OIS effectiveness (5.5 stops vs 0 stops)
- ARF 50mm F1.2L USM has lower Max aperture (Wide) (f/1.2 vs f/4.5)
- ARF 50mm F1.2L USM has lower Max aperture (Tele) (f/1.2 vs f/4.5)
- ARF 50mm F1.2L USM has lower Min focus distance (40 cm vs 150 cm)
- ARF 50mm F1.2L USM has lower Length (108 mm vs 209.5 mm)
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
FE 300mm F4.5-5.6 G OSS
⌀89 × 210 mm
1640 g (3.62 lb / 57.85 oz)
RF 50mm F1.2L USM is 102mm shorter than FE 300mm F4.5-5.6 G OSS.
RF 50mm F1.2L USM is 690 g lighter than FE 300mm F4.5-5.6 G 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
- ✓
Max aperture (Wide)
f/1.2 vs f/4.5 — lower is better
- ✓
Max aperture (Tele)
f/1.2 vs f/4.5 — lower is better
- ✓
Min focus distance
40 cm vs 150 cm — lower is better
- ✓
Length
108 mm vs 209.5 mm — lower is better
- ✓
Weight
950 g vs 1640 g — lower is better
Reasons to choose the FE 300mm F4.5-5.6 G OSS
- ✓
Special elements
Adds 2 ED, 1 Super ED
- ✓
OIS effectiveness
5.5 stops vs 0 stops — higher is better
- ✓
Optical stabilization
Only FE 300mm F4.5-5.6 G OSS supports it
- ✓
Custom function button
Only FE 300mm F4.5-5.6 G OSS supports it
- ✓
Max magnification
0.31 × vs 0.19 × — higher is better
Shared specifications
Internal focus
Both support internal focus
Diameter
Both 89 mm
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
FE 300mm F4.5-5.6 G OSS
Pros
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Built-in optical image stabilization
- ✓Weather-sealed construction for outdoor shooting
Cons
- –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 300mm F4.5-5.6 G OSS at major authorized retailers.
Canon RF 50mm F1.2L USM
Sony FE 300mm F4.5-5.6 G OSS
Affiliate disclosure: As an Amazon Associate, Cameraegg earns from qualifying purchases. Cameraegg may also earn commission from B&H links, at no extra cost to you.
Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.