OM-3vs A1 II
OM System
OM-3 (2024)
Starting from £999 new
Best for Travel, outdoor & adventure photography
View OM-3
VS
Sony
A1 II (2025)
Starting from £6500 new
Best for Professional sports, wildlife & high-resolution studio work
View A1 II
GearScore™ Verdict — Which should you buy?
Travel, Outdoor & Adventure Photography — OM-3 (2024): The ideal mid-range OM System camera — weather sealed, class-leading IBIS, and superb computational features in a compact body.
Professional Sports, Wildlife & High-Resolution Studio Work — A1 II (2025): The most complete camera ever made — 50MP, 30fps, 8K, and the world's best EVF in a single flagship body.
Who should buy what
OM-3 (2024)
- 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
A1 II (2025)
- Professional sports and wildlife photographers who need 30fps, 50MP, and the best AF available
- Commercial and advertising photographers who demand 50MP resolution alongside pro video specs
- Photojournalists who need a single body capable of handling every assignment
- Sony system shooters ready to invest in the absolute best
Quick take: The a1 ii has the highest resolution at 50mp; the om-3 is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | OM-3 (2024) | A1 II (2025) |
|---|---|---|
| Price | £999 | £6,500 |
| Sensor | 20.4MP Live MOS Micro Four Thirds | 50.1MP full-frame stacked BSI CMOS |
| Resolution | 20.4MP | 50.1MP |
| Video | 4K/60p (10-bit), C4K/30p, 1080p/120p | 8K/30p, 4K/120p 10-bit, 4K/240p super slow-motion |
| Autofocus | Phase-detect AF — subject recognition (human, animal, bird, vehicle) | AI subject recognition — human, animal, bird, insect, vehicle, aircraft, train |
| Stabilisation | IBIS — up to 6.5 stops (7.5 stops with Sync IS lenses) | 8.5-stop IBIS (with in-lens OSS) |
| Burst Rate | 10fps mechanical, 30fps electronic with AF | 30fps electronic (with full AF/AE), 10fps mechanical |
| Battery Life | ~400 shots (CIPA) | ~530 shots (CIPA) |
| Weight | 414g (with battery) | 743g body only |
| Dimensions | 122.3 × 84.6 × 49.4mm | 136.1 × 96.9 × 82.9mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF, 2.36M dots, 0.74× magnification | EVF 0.9× 9.44M-dot — the highest resolution EVF available |
| Screen | 3.0" fully articulating touchscreen | 3.2" fully articulating touchscreen, 2.1M dots |
| Mount | Micro Four Thirds | Sony E-mount (full-frame) |
| Memory Cards | Single SD UHS-II slot | Dual CFexpress Type A / SD UHS-II slots |
| Connectivity | USB-C, Wi-Fi, Bluetooth | USB-C 3.2 Gen 2, Wi-Fi 6GHz, Bluetooth 5.3, HDMI full-size |
Suitability by genre
| Genre | OM-3 | A1 II |
|---|---|---|
| Travel | ||
| Wildlife | ||
| Landscape | ||
| Street | — | |
| Portrait | ||
| Vlogging & Video | ||
| Sports | — |
More comparisons with OM-3
Camera family history