OM System
OM-3 2025
Best for Travel, outdoor & adventure photography
£1599
new today at Clifton Cameras
Decision tools · Compare
OM-3 vs A7C II
Quick take: The A7C II has the highest resolution at 33MP; the OM-3 is the most affordable.
16 specs side by side·15 genres scored·UK prices from Wex Photo Video and Clifton Cameras
How to read this page. Highlighted cells win that row on the spec alone. Genre scores are the engine's base scores (enthusiast, photo and video); Camera Match re-weights them for your level and priorities. Price buttons are affiliate links; the price you pay is the same.
Price buttons are affiliate links — GearFrame may earn a commission at no extra cost to you. It never affects a score. Learn more
Verdictwhich should you buy?
OM-3 — Travel, Outdoor & Adventure Photography: The ideal mid-range OM System camera — weather sealed, class-leading IBIS, and superb computational features in a compact body.
A7C II — Full-Frame Hybrid: Full-frame AI autofocus in the most compact body available — the best camera under £1,500 for hybrid shooters.
Who should buy what
OM-3 (2025)
is the right camera for you if…
- Outdoor and adventure photographers who need weather sealing and compact size
- Wildlife and bird photographers wanting improved AF over the OM-5
- Travel shooters who want a rugged, lightweight MFT system
- OM-5 or E-M5 III owners wanting better autofocus without going to the OM-1
A7C II (2023)
is the right camera for you if…
- Travel photographers who want full-frame quality in the most compact body
- Hybrid shooters who need full-frame video and IBIS in a small package
- A7C owners looking for a significant AF and video upgrade
- Portrait and wedding photographers who want a discreet full-frame backup
Full specificationsthe better value in each row is highlighted
| Specification | OM-3OM System · 2025 | A7C IISony · 2023 |
|---|---|---|
| Price | £1,599Best | £1,799 |
| Sensor | 20.4MP Live MOS Micro Four Thirds | 33MP Full-frame Exmor R BSI CMOS |
| Resolution | 20.4MP | 33.0MPBest |
| Video | 4K/60p (10-bit), C4K/30p, 1080p/120p | 4K/60p oversampled, S-Log3, 10-bit internal |
| Autofocus | Phase-detect AF — subject recognition (human, animal, bird, vehicle) | 759-point phase-detect, AI subject recognition |
| Stabilisation | IBIS — up to 6.5 stops (7.5 stops with Sync IS lenses) | 5-axis IBIS, 7.0 stops |
| Burst Rate | 10fps mechanical, 30fps electronic with AF | 10fps mechanical, 30fps electronic |
| Battery Life | ~400 shots (CIPA) | ~530 shots (CIPA)Best |
| Weight | 414g (with battery and card)Best | 514g (body only) |
| Dimensions | 122.3 × 84.6 × 49.4mm | 124.0 × 71.1 × 63.4mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF, 2.36M dots, 0.74× magnification | EVF, 2.36M dots, 0.70× magnification |
| Screen | 3.0" fully articulating touchscreen | 3.0" vari-angle touchscreen |
| Mount | Micro Four Thirds | Sony FE (full-frame E-mount) |
| Memory Cards | Single SD UHS-II slot | Single SD UHS-II slot |
| Connectivity | USB-C, Wi-Fi, Bluetooth | USB-C (3.2), Bluetooth, Wi-Fi |
Wins the row — price, resolution, burst, battery, weight and sealing are compared; text specs aren't ranked.
How they score by genreengine base scores out of 10
Genre
OM-3
A7C II
Portrait
7.3/10
8.3/10
Street
6.9/10
7.9/10
Travel
6.7/10
7.2/10
Wedding & Events
6.8/10
7.1/10
Vlogging & Video
6.5/10
6.8/10
Filmmaking
6.7/10
7.1/10
Documentary
7.9/10
7.8/10
Sports & Action
8.9/10
7.3/10
Landscape
6.2/10
6.9/10
Wildlife
9.0/10
8.0/10
Casual
5.8/10
5.9/10
Food
7.3/10
8.0/10
Macro
8.2/10
7.7/10
Architecture
6.3/10
7.0/10
Astrophotography
6.1/10
7.4/10
Scores come from the same engine as Camera Match: verified specifications weighted by what each genre needs, with documented adjustments. The product page and this table show the enthusiast base score. See how scores are calculated →
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