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
Canon
RF 28mm F2.8 STM
Canon RF Mount
World's smallest RF lens — 120g pancake with STM AF and 0.23m close focus.
$299
Launch priceReleased May 2023
RF 28mm F2.8 STM is 3.8 years newer.
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Wins
RF 24-70mm F2.8L IS USM
Wins
RF 28mm F2.8 STM
2 categories tied
Which would you choose?
TL;DR — Key differences
- ARF 24-70mm F2.8L IS USM has higher OIS effectiveness (5 stops vs 0 stops)
- BRF 28mm F2.8 STM has lower Weight (120 g vs 900 g)
- BRF 28mm F2.8 STM has lower Length (24.7 mm vs 125 mm)
- ARF 24-70mm F2.8L IS USM has higher Max magnification (0.3 × vs 0.17 ×)
- BRF 28mm F2.8 STM has lower Diameter (69.2 mm vs 88 mm)
Key specs at a glance
Size and weight, to scale
📸 Snap this lens size diff to share
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
RF 28mm F2.8 STM
⌀69 × 25 mm
120 g (0.26 lb / 4.23 oz)
RF 24-70mm F2.8L IS USM is 100mm longer and 19mm wider than RF 28mm F2.8 STM.
RF 24-70mm F2.8L IS USM is 780 g heavier than RF 28mm F2.8 STM.
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
- ✓
OIS effectiveness
5 stops vs 0 stops — higher is better
- ✓
Optical stabilization
Only RF 24-70mm F2.8L IS USM supports it
- ✓
Weather sealing
Only RF 24-70mm F2.8L IS USM supports it
- ✓
Control ring
Only RF 24-70mm F2.8L IS USM supports it
- ✓
Max magnification
0.3 × vs 0.17 × — higher is better
- ✓
Min focus distance
21 cm vs 23 cm — lower is better
Reasons to choose the RF 28mm F2.8 STM
- ✓
Special elements
Adds 3 PMo
- ✓
Weight
120 g vs 900 g — lower is better
- ✓
Length
24.7 mm vs 125 mm — lower is better
- ✓
Diameter
69.2 mm vs 88 mm — lower is better
Shared specifications
Max aperture (Wide)
Both f/2.8
Max aperture (Tele)
Both f/2.8
Internal focus
Both support internal focus
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
RF 28mm F2.8 STM
Pros
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Lightweight design easy to carry all day
- ✓Native Canon RF mount compatibility
Cons
- –Third-party or older alternatives may offer better value
Decided which one is right for you?
Compare live prices for the RF 24-70mm F2.8L IS USM and RF 28mm F2.8 STM at major authorized retailers.
Canon RF 24-70mm F2.8L IS USM
Canon RF 28mm F2.8 STM
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.