Upgrade Guide
OM System PEN→OM System OM-3
Is it worth upgrading? Spec analysis, key improvements, and our verdict.
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Situational
One clear hardware improvement over the PEN. Worth it if that specific upgrade aligns with what you shoot.
What's new in the OM-3
-
StabilisationImproved — IBIS — up to 6.5 stops (7.5 stops with Sync IS lenses)
Unchanged or similar
-
ResolutionSimilar (20MP)
Suitability by genre
Base scores — computed from verified specs for an enthusiast shooting photo and video. The Upgrade Checker adjusts them for your skill level.
| Genre | PEN | OM-3 | |
|---|---|---|---|
| Portrait | +0.3 | ||
| Street | -0.9 | ||
| Travel | -0.5 | ||
| Wedding & Events | +0.5 | ||
| Vlogging & Video | — | ||
| Filmmaking | +1.5 | ||
| Documentary | +0.9 | ||
| Sports & Action | +1.2 | ||
| Landscape | +0.1 | ||
| Wildlife | +0.9 | ||
| Casual | -0.5 | ||
| Food | +0.4 | ||
| Macro | +1.4 | ||
| Architecture | +0.2 | ||
| Astrophotography | +0.2 | ||
| Fun & simple | — |
Full spec comparison
| Spec | PEN | OM-3 | |
|---|---|---|---|
| Price | £849 | £999 | |
| Released | 2026 | 2025 | ↓ |
| Sensor | 20.4MP Four Thirds Live MOS | 20.4MP Live MOS Micro Four Thirds | |
| Resolution | 20MP | 20MP | |
| Video | 4K/C4K, OM-Log400, vertical video support | 4K/60p (10-bit), C4K/30p, 1080p/120p | |
| Autofocus | Phase-hybrid AF (121 points) with subject detection (people, cats, dogs) | Phase-detect AF — subject recognition (human, animal, bird, vehicle) | |
| Stabilisation | 5.5-stop IBIS | IBIS — up to 6.5 stops (7.5 stops with Sync IS lenses) | |
| Burst Rate | 30fps electronic | 10fps mechanical, 30fps electronic with AF | ↓ |
| Battery Life | 410 shots (CIPA) | ~400 shots (CIPA) | ↓ |
| Weight | 393g (with battery and card) | 414g (with battery and card) | ↓ |
| Weather Sealed | Yes | Yes | |
| Viewfinder | EVF, 2.36M dots | EVF, 2.36M dots, 0.74× magnification | |
| Screen | Tilting touchscreen | 3.0" fully articulating touchscreen | |
| Mount | Micro Four Thirds | Micro Four Thirds | |
| Memory Cards | Single SD (UHS-I) | Single SD UHS-II slot |
Compare side-by-side
⚖️ Compare these cameras
See PEN and OM-3 next to each other with our interactive comparison tool.
Get a personalised upgrade score
Run the upgrade checker →
Tell us what you shoot and we'll score the OM-3 against your specific genres — not just specs.
Other upgrades from the PEN
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Camera family history