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
Sony
FE 24-70mm F2.8 GM II
Sony E Mount
The ultimate standard zoom — incredibly sharp, exceptionally compact, and built for professionals.
$2,299
Launch priceReleased Apr 2022
FE 24-70mm F2.8 GM II is 2 months newer.
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Wins
M.Zuiko Digital ED 12-40mm F2.8 PRO II
Wins
FE 24-70mm F2.8 GM II
3 categories tied
Which would you choose?
TL;DR — Key differences
- AM.Zuiko Digital ED 12-40mm F2.8 PRO II has lower Weight (382 g vs 695 g)
- AM.Zuiko Digital ED 12-40mm F2.8 PRO II has lower Length (84 mm vs 120 mm)
- AM.Zuiko Digital ED 12-40mm F2.8 PRO II has lower Diameter (69.9 mm vs 88 mm)
- BFE 24-70mm F2.8 GM II has higher Max magnification (0.32 × vs 0.3 ×)
- AM.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 shareM.Zuiko Digital ED 12-40mm F2.8 PRO II
⌀70 × 84 mm
382 g (0.84 lb / 13.47 oz)
Credit card
85.6 × 54 mm
for scale
FE 24-70mm F2.8 GM II
⌀88 × 120 mm
695 g (1.53 lb / 24.52 oz)
M.Zuiko Digital ED 12-40mm F2.8 PRO II is 36mm shorter and 18mm narrower than FE 24-70mm F2.8 GM II.
M.Zuiko Digital ED 12-40mm F2.8 PRO II is 313 g lighter than FE 24-70mm F2.8 GM 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 M.Zuiko Digital ED 12-40mm F2.8 PRO II
- ✓
Special elements
Adds 1 EDA, 2 Aspherical, 1 DSA…
- ✓
Weight
382 g vs 695 g — lower is better
- ✓
Length
84 mm vs 120 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
Reasons to choose the FE 24-70mm F2.8 GM II
- ✓
Special elements
Adds 2 XA (extreme aspherical), 3 Aspherical, 2 Super ED
- ✓
Max magnification
0.32 × vs 0.3 × — higher is better
Shared specifications
Max aperture (Wide)
Both f/2.8
Max aperture (Tele)
Both f/2.8
Internal focus
Both support internal focus
Weather sealing
Both support weather sealing
Control ring
Both support control ring
Custom function button
Both support custom function button
Pros & cons at a glance
Editorially curated highlights and trade-offs.
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
FE 24-70mm F2.8 GM II
Pros
- ✓Outstanding sharpness across the entire zoom range
- ✓Remarkably small and lightweight for an f/2.8 zoom
- ✓Four XD Linear focus motors provide blazing-fast AF tracking
- ✓Excellent close-up magnification
- ✓De-clickable aperture ring and customized function buttons
Cons
- –No built-in optical image stabilization (relies on body IBIS)
- –High launch price
- –Aperture ring can be easily bumped if not locked
Decided which one is right for you?
Compare live prices for the M.Zuiko Digital ED 12-40mm F2.8 PRO II and FE 24-70mm F2.8 GM II at major authorized retailers.
OM System M.Zuiko Digital ED 12-40mm F2.8 PRO II
Sony FE 24-70mm F2.8 GM II
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.