Canon
RF 24-70mm F2.8L IS USM
Canon RF Mount
The cornerstone zoom for Canon mirrorless, featuring 5 stops of optical image stabilization.
$2,399
Launch priceReleased Aug 2019
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 years newer.
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Wins
RF 24-70mm F2.8L IS USM
Wins
FE 300mm F4.5-5.6 G OSS
TL;DR — Key differences
- ARF 24-70mm F2.8L IS USM has lower Min focus distance (21 cm vs 150 cm)
- ARF 24-70mm F2.8L IS USM has lower Weight (900 g vs 1640 g)
- ARF 24-70mm F2.8L IS USM has lower Length (125 mm vs 209.5 mm)
- ARF 24-70mm F2.8L IS USM has lower Max aperture (Wide) (f/2.8 vs f/4.5)
- ARF 24-70mm F2.8L IS USM has lower Max aperture (Tele) (f/2.8 vs f/4.5)
Key specs at a glance
Size and weight, to scale
RF 24-70mm F2.8L IS USM
⌀88 × 125 mm
900 g (1.98 lb / 31.75 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 24-70mm F2.8L IS USM is 85mm shorter and 1mm narrower than FE 300mm F4.5-5.6 G OSS.
RF 24-70mm F2.8L IS USM is 740 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 24-70mm F2.8L IS USM
- ✓
Special elements
Adds 3 Aspherical, 3 UD
- ✓
Min focus distance
21 cm vs 150 cm — lower is better
- ✓
Weight
900 g vs 1640 g — lower is better
- ✓
Length
125 mm vs 209.5 mm — lower is better
- ✓
Max aperture (Wide)
f/2.8 vs f/4.5 — lower is better
- ✓
Max aperture (Tele)
f/2.8 vs f/4.5 — lower is better
- ✓
Diameter
88 mm vs 89 mm — lower is better
Reasons to choose the FE 300mm F4.5-5.6 G OSS
- ✓
Special elements
Adds 2 ED, 1 Super ED
- ✓
Custom function button
Only FE 300mm F4.5-5.6 G OSS supports it
- ✓
OIS effectiveness
5.5 stops vs 5 stops — higher is better
- ✓
Max magnification
0.31 × vs 0.3 × — higher is better
Shared specifications
Internal focus
Both support internal focus
Optical stabilization
Both support optical stabilization
Weather sealing
Both support weather sealing
Control ring
Both support control ring
Pros & cons at a glance
Editorially curated highlights and trade-offs.
RF 24-70mm F2.8L IS USM
Pros
- ✓Built-in optical image stabilization (up to 5 stops)
- ✓Excellent L-series sharpness and build quality
- ✓Fast and silent Nano USM focus motor
- ✓Very low chromatic aberration
Cons
- –Heavier than competitive options (900g)
- –Pricey entry threshold
- –Minor barrel distortion at 24mm
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 24-70mm F2.8L IS USM and FE 300mm F4.5-5.6 G OSS at major authorized retailers.
Canon RF 24-70mm F2.8L IS 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.