Upgrade Guide
OM System OM-3→OM System PEN
Is it worth upgrading? Spec analysis, key improvements, and our verdict.
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Worthwhile
Clear improvements over the OM-3. Whether it justifies the cost depends on which upgrades matter most to your shooting.
What's new in the PEN
-
Burst rate30fps electronic vs 10fps mechanical, 30fps electronic with AF
-
Generation1 year newer (2026 vs 2025)
Unchanged or similar
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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 | OM-3 | PEN | |
|---|---|---|---|
| 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 | OM-3 | PEN | |
|---|---|---|---|
| Price | £999 | £849 | |
| Released | 2025 | 2026 | ↑ |
| Sensor | 20.4MP Live MOS Micro Four Thirds | 20.4MP Four Thirds Live MOS | |
| Resolution | 20MP | 20MP | |
| Video | 4K/60p (10-bit), C4K/30p, 1080p/120p | 4K/C4K, OM-Log400, vertical video support | |
| Autofocus | Phase-detect AF — subject recognition (human, animal, bird, vehicle) | Phase-hybrid AF (121 points) with subject detection (people, cats, dogs) | |
| Stabilisation | IBIS — up to 6.5 stops (7.5 stops with Sync IS lenses) | 5.5-stop IBIS | |
| Burst Rate | 10fps mechanical, 30fps electronic with AF | 30fps electronic | ↑ |
| Battery Life | ~400 shots (CIPA) | 410 shots (CIPA) | ↑ |
| Weight | 414g (with battery and card) | 393g (with battery and card) | ↑ |
| Weather Sealed | Yes | Yes | |
| Viewfinder | EVF, 2.36M dots, 0.74× magnification | EVF, 2.36M dots | |
| Screen | 3.0" fully articulating touchscreen | Tilting touchscreen | |
| Mount | Micro Four Thirds | Micro Four Thirds | |
| Memory Cards | Single SD UHS-II slot | Single SD (UHS-I) |
Compare side-by-side
⚖️ Compare these cameras
See OM-3 and PEN 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 PEN against your specific genres — not just specs.
Other upgrades from the OM-3
Related buying guides
Camera family history