OM System OM-1 Mark IIvs A7R II
OM System
OM System OM-1 Mark II (2024)
Starting from £1999 new
Best for Wildlife, birds & outdoor sports
View OM System OM-1 Mark II
Sony
A7R II (2015)
Starting from £799 new
Best for Portrait, landscape & studio photography
View A7R II
GearScore™ Verdict — Which should you buy?
Wildlife, Birds & Outdoor Sports — OM System OM-1 Mark II (2024): OM System's most capable camera — 120fps AF burst, AI subject detection, and IP53 weather sealing make it the best-value pro wildlife camera.
Portrait, Landscape & Studio Photography — A7R II (2015): The A7R II transformed the A7R series — adding IBIS, 4K video, BSI sensor tech, and phase-detect AF in one generation. A landmark Sony camera.
Who should buy what
OM System OM-1 Mark II (2024)
- Wildlife and bird photographers who need the best subject tracking in MFT
- Sports photographers who want weather sealing and 50fps burst
- OM-1 owners looking for a meaningful autofocus upgrade
- Professionals who need pro-grade weather sealing in the lightest possible system
A7R II (2015)
- Landscape and architecture photographers who want 42MP with IBIS for handheld shooting
- Portrait and studio photographers who need high resolution with improved AF reliability
- Sony FE system users who want a capable high-resolution body at a used price
- A7R I owners who need the stabilisation, 4K, and improved AF the original lacked
Quick take: The a7r ii has the highest resolution at 42mp; the a7r ii is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | OM System OM-1 Mark II (2024) | A7R II (2015) |
|---|---|---|
| Price | £1,999 | £799 |
| Sensor | 20MP Micro Four Thirds Live MOS | 42.4MP Full-Frame BSI CMOS Exmor R |
| Resolution | 20.0MP | 42.4MP |
| Video | 4K/60p, 1080p/240p, 4K HLG | 4K/30p (S35 or full-frame), 1080p/120p |
| Autofocus | AI subject detection AF (birds, animals, motorsport) | 399 phase-detect + 25 contrast-detect AF points, face detection |
| Stabilisation | 8.5-stop IBIS | IBIS — 5-axis, up to 4.5 stops (first A7R with IBIS) |
| Burst Rate | 120fps with AF tracking | 5fps |
| Battery Life | 520 shots (CIPA) | ~290 shots (CIPA) |
| Weight | 599g body only | 625g (with battery and card) |
| Dimensions | 134.8 × 91.6 × 72.7mm | 126.9 × 95.7 × 60.3mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | 0.83" OLED EVF, 5.76M dots, 120fps | EVF, OLED 2.36M dots, 0.78× magnification |
| Screen | 3.0" fully articulating touchscreen | 3.0" tilting LCD, 1.23M dots (no touch) |
| Mount | Micro Four Thirds | Sony FE (full-frame E-mount) |
| Memory Cards | Dual SD UHS-II | Single SD UHS-I slot |
| Connectivity | USB-C, Wi-Fi, Bluetooth | USB, Wi-Fi, NFC |
Suitability by genre
| Genre | OM System OM-1 Mark II | A7R II |
|---|---|---|
| Wildlife | — | |
| Sports & Action | ||
| Landscape | ||
| Travel | ||
| Portrait | ||
| Vlogging & Video | ||
| Architecture | — |
GearScore™ suitability scores are based on aggregated purchaser reviews weighted by photography genre. See how scores are calculated →
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Camera family history