OM-1vs A1 II
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?
Wildlife, Sport, Outdoor — OM-1 (2022): OM System's statement camera — class-leading weather sealing and the best IBIS in the business.
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-1 (2022)
- Wildlife and bird photographers who need fast burst and pro weather sealing
- Outdoor photographers who work in challenging conditions
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-1 is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | OM-1 (2022) | A1 II (2025) |
|---|---|---|
| Price | £1,299 | £6,500 |
| Sensor | Micro Four Thirds Live MOS stacked BSI | 50.1MP full-frame stacked BSI CMOS |
| Resolution | 20.4MP | 50.1MP |
| Video | 4K 60fps 10-bit | 8K/30p, 4K/120p 10-bit, 4K/240p super slow-motion |
| Autofocus | 1053-point cross-type phase-detect, AI subject recognition | AI subject recognition — human, animal, bird, insect, vehicle, aircraft, train |
| Stabilisation | 5-axis IBIS, 7.0 stops (8 stops with sync IS) | 8.5-stop IBIS (with in-lens OSS) |
| Burst Rate | 10fps mechanical, 50fps electronic, 120fps Pro Capture | 30fps electronic (with full AF/AE), 10fps mechanical |
| Battery Life | 520 shots (CIPA) | ~530 shots (CIPA) |
| Weight | 599g (body only) | 743g body only |
| Dimensions | 134.8 × 91.6 × 72.7mm | 136.1 × 96.9 × 82.9mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF 0.83× 5.76M-dot | EVF 0.9× 9.44M-dot — the highest resolution EVF available |
| Screen | 3.0" fully articulating touchscreen, 1.62M-dot | 3.2" fully articulating touchscreen, 2.1M dots |
| Mount | Micro Four Thirds | Sony E-mount (full-frame) |
| Memory Cards | 2× SD UHS-II / CFexpress Type B | Dual CFexpress Type A / SD UHS-II slots |
| Connectivity | Wi-Fi 5GHz, Bluetooth 5.0, USB-C 3.1, HDMI, 3.5mm mic/headphone | USB-C 3.2 Gen 2, Wi-Fi 6GHz, Bluetooth 5.3, HDMI full-size |
Suitability by genre
| Genre | OM-1 | A1 II |
|---|---|---|
| Wildlife | ||
| Sports & Action | — | |
| Landscape | ||
| Travel | ||
| Portrait | ||
| Casual | — | |
| Astrophotography | — | |
| Sports | — | |
| Vlogging & Video | — |
More comparisons with OM-1
Camera family history