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
OM System
M.Zuiko Digital ED 12-40mm F2.8 PRO II
Micro Four Thirds Mount
IP53 weather-sealed standard zoom with constant F2.8, MSC autofocus, and 0.3× magnification at 40mm.
$1,299
Launch priceReleased Feb 2022
M.Zuiko Digital ED 12-40mm F2.8 PRO II is 2.5 years newer.
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Wins
RF 24-70mm F2.8L IS USM
Wins
M.Zuiko Digital ED 12-40mm F2.8 PRO II
3 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)
- BM.Zuiko Digital ED 12-40mm F2.8 PRO II has lower Weight (382 g vs 900 g)
- BM.Zuiko Digital ED 12-40mm F2.8 PRO II has lower Length (84 mm vs 125 mm)
- BM.Zuiko Digital ED 12-40mm F2.8 PRO II has lower Diameter (69.9 mm vs 88 mm)
- BM.Zuiko Digital ED 12-40mm F2.8 PRO II has lower Min focus distance (20 cm vs 21 cm)
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
M.Zuiko Digital ED 12-40mm F2.8 PRO II
⌀70 × 84 mm
382 g (0.84 lb / 13.47 oz)
RF 24-70mm F2.8L IS USM is 41mm longer and 18mm wider than M.Zuiko Digital ED 12-40mm F2.8 PRO II.
RF 24-70mm F2.8L IS USM is 518 g heavier than M.Zuiko Digital ED 12-40mm F2.8 PRO II.
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
Reasons to choose the M.Zuiko Digital ED 12-40mm F2.8 PRO II
- ✓
Special elements
Adds 1 EDA, 2 Aspherical, 1 DSA…
- ✓
Weight
382 g vs 900 g — lower is better
- ✓
Custom function button
Only M.Zuiko Digital ED 12-40mm F2.8 PRO II supports it
- ✓
Length
84 mm vs 125 mm — lower is better
- ✓
Diameter
69.9 mm vs 88 mm — lower is better
- ✓
Min focus distance
20 cm vs 21 cm — lower is better
Shared specifications
Max aperture (Wide)
Both f/2.8
Max aperture (Tele)
Both f/2.8
Max magnification
Both 0.3 ×
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 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
M.Zuiko Digital ED 12-40mm F2.8 PRO II
Pros
- ✓Constant F2.8 across 12–40mm (24–80mm equiv.)
- ✓IP53 dust/splash/freeze resistance with ZERO coating
- ✓Compact 382g body with MF clutch and L-Fn button
Cons
- –No lens-based IS — relies on Sync IS in compatible bodies
- –Extending barrel design
Decided which one is right for you?
Compare live prices for the RF 24-70mm F2.8L IS USM and M.Zuiko Digital ED 12-40mm F2.8 PRO II at major authorized retailers.
Canon RF 24-70mm F2.8L IS USM
OM System M.Zuiko Digital ED 12-40mm F2.8 PRO II
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.