OM System
OM System (the rebranded former Olympus) doubles down on Micro Four Thirds — the smallest sensor format in the mirrorless market, paired with the best IBIS in the industry, weather sealing that's frankly absurd, and computational features (Live ND, in-camera focus stacking) that other brands don't match.
Cameras
3
Lenses
2
Mounts
1
Other
0
Mount ecosystem
OM System lens systems
The mounts this brand maintains, with bodies and native lenses tracked here.
Cameras
Best OM System cameras
Ranked by rating and demand. Open any card for the full review and current offers.
OM System OM-1 Mark II
Computational MFT flagship for the field
OM System OM-3
Stacked-sensor retro MFT
OM System OM-5
Adventure-ready compact MFT
Picks at every tier
Best by buyer type
The clearest match in each price tier — useful when you're shopping by budget, not by lineup.
$1,115 · Micro 4/3
Under $1,500 — highest rating in the entry tier
Lenses
Best OM System lenses
First-party glass ranked across mounts.
What OM System does well
- Class-leading IBIS — 7–8 stops of correction is normal here, not headline.
- IP53-rated weather sealing on flagship bodies is unmatched in mirrorless.
- Computational features (Live ND, in-camera focus stacking, Pro Capture) save real time.
- Compact telephoto reach — a 300mm f/4 PRO weighs less than most 70-200s.
Honest tradeoffs
- MFT sensors trail full-frame in low light by ~2 stops — meaningful for indoor / dusk work.
- Lens lineup is mature but smaller third-party support than other systems.
- Resale on bodies has softened as full-frame mirrorless prices dropped.
Cross-shop
Brands worth comparing to OM System
The closest competitors a serious shopper actually weighs against this lineup.
Bottom line
OM System makes sense when weather sealing, IBIS, and telephoto reach matter more than absolute low-light performance.