OM System M.Zuiko 12-40mm f/2.8 PRO II vs OM System M.Zuiko 8-25mm f/4 PRO

Both are Micro Four Thirds mount zooms for travel — here's how the specs differ and which to pick. Every spec is from the manufacturer's own catalog.

Last verified 2026-06-21 · Micro Four Thirds mount · prices change — check the retailer

Spec	OM System M.Zuiko 12-40mm f/2.8 PRO II	OM System M.Zuiko 8-25mm f/4 PRO
Focal length	12-40mm	8-25mm
Max aperture	f/2.8	f/4
Type	zoom	zoom
Coverage	Micro Four Thirds	Micro Four Thirds
Mount	Micro Four Thirds	Micro Four Thirds

Which should you buy?

the OM System M.Zuiko 12-40mm f/2.8 PRO II opens wider (f/2.8) — brighter in low light and more background blur
the OM System M.Zuiko 12-40mm f/2.8 PRO II covers 12-40mm and the OM System M.Zuiko 8-25mm f/4 PRO covers 8-25mm — pick the range that matches what you shoot

Where to buy

OM SYSTEM Olympus M.Zuiko Digital ED 12-40mm F2.8 PRO II for Micro Four Thirds System Camera Weather Sealed Design Fluor

Check the OM System M.Zuiko 12-40mm f/2.8 PRO II price on Amazon →

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OM SYSTEM Olympus M.Zuiko Digital ED 8-25mm F4.0 PRO for Micro Four Thirds System Camera, Compact Ultra Wide Zoom Lens,

Check the OM System M.Zuiko 8-25mm f/4 PRO price on Amazon →

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FAQ

What's the difference between the OM System M.Zuiko 12-40mm f/2.8 PRO II and the OM System M.Zuiko 8-25mm f/4 PRO?
The OM System M.Zuiko 12-40mm f/2.8 PRO II is 12-40mm f/2.8 zoom, Micro Four Thirds; the OM System M.Zuiko 8-25mm f/4 PRO is 8-25mm f/4 zoom, Micro Four Thirds. Both fit the Micro Four Thirds mount.

Which is better in low light, the OM System M.Zuiko 12-40mm f/2.8 PRO II or the OM System M.Zuiko 8-25mm f/4 PRO?
The OM System M.Zuiko 12-40mm f/2.8 PRO II — its f/2.8 maximum aperture lets in more light and gives more background blur than the f/4 of the other.

Do the OM System M.Zuiko 12-40mm f/2.8 PRO II and OM System M.Zuiko 8-25mm f/4 PRO fit the same camera?
Yes — both are Micro Four Thirds mount lenses, so they fit OM System (Olympus) and Panasonic Lumix G Micro Four Thirds bodies.

Citing these specs? Go ahead — manufacturer data, last verified 2026-06-21. Copy a ready-made reference:

More Micro Four Thirds comparisons: OM System M.Zuiko 100-400mm f/5-6.3 IS vs Panasonic Lumix G 100-300mm f/4-5.6 II · OM System M.Zuiko 100-400mm f/5-6.3 IS II vs Panasonic Lumix G 100-300mm f/4-5.6 II · OM System M.Zuiko 17mm f/1.8 vs Panasonic Leica DG 15mm f/1.7 · OM System M.Zuiko 40-150mm f/2.8 PRO vs OM System M.Zuiko 150-600mm f/5-6.3 IS · all Micro Four Thirds lenses · all comparisons

OM System M.Zuiko 12-40mm f/2.8 PRO IIAffiliate linkAmazon →