OM System M.Zuiko 12-40mm f/2.8 PRO II
An enthusiast standard zoom for Micro Four Thirds, the M.Zuiko 12-40mm f/2.8 PRO II offers a 24-80mm-equivalent range, constant f/2.8, and IP53 weather sealing in a 382g body with a 62mm thread. It is an everyday workhorse for OM-1/OM-5 and Panasonic MFT shooters. Note there is no in-lens stabilization, so it relies entirely on body IBIS.
Scores
BreakdownHideOverall70±3Caliber-forward blend — tier caliber + within-tier price rank 30%, value 25%, confidence 20%, compatibility 15%, upgrade path 10% — renormalized over applicable dimensions.
Scores
BreakdownHideCaliber-forward blend — tier caliber + within-tier price rank 30%, value 25%, confidence 20%, compatibility 15%, upgrade path 10% — renormalized over applicable dimensions.
The ± band on the overall score reflects sourcing confidence — wider when fewer specs are verified.
How each score is computed: our scoring methodology.
Specifications
| Spec | Value | Verification |
|---|---|---|
| mount | mftSourced | Sourced |
| coverage | Micro Four ThirdsSourced | Sourced |
| focal length | 12 40mmSourced | Sourced |
| max aperture | f/2.8Sourced | Sourced |
| filter thread (mm) | 62Sourced | Sourced |
| stabilized | noSourced | Sourced |
| weight (g) | 382Sourced | Sourced |
7/7 detail specs sourced. Amber rows are flagged for verification — we show them as reported, not confirmed.
Verdict
Best for
- The pro MFT standard zoom — 24-80mm equiv, constant f/2.8, IP53 weather sealing
- Everyday workhorse for OM-1/OM-5 and Panasonic MFT bodies
Who should skip this
- In-lens stabilization needs (no IS — relies on body IBIS / Sync IS not supported)
Where to buy
List price $1,000
Prices are a guide and can change — confirm the current price on the retailer's site before buying.
Prices last checked Jul 8, 2026 — retailer prices change often, so click through for the current price.
Some links may be affiliate links — we may earn a commission at no extra cost to you; rankings are never influenced by it.
Ecosystem
Compatibility
Built around Micro Four Thirds. Make sure the rest of your build uses the same platform before you buy — mismatched sockets, mounts or standards are the most common return reason. Check it in the builder →
Upgrade path
Outgrow it and the OM System M.Zuiko 40-150mm f/2.8 PRO is the natural next step up in lenses. See it →