OM System OM-1 Mark IIvs A7CR
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
VS
Sony
A7CR (2023)
Starting from £3099 new
Best for Travel, landscape & portrait photography with minimal kit
View A7CR
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.
Travel, Landscape & Portrait Photography With Minimal Kit — A7CR (2023): The world's smallest 61MP full-frame camera — A7R V quality in a pocketable A7C body.
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
A7CR (2023)
- Landscape photographers who want 61MP resolution without carrying a large body
- Travel photographers who need professional image quality in the smallest possible package
- Portrait shooters who want A7R V sensor quality with the ease of the A7C form factor
- A7C owners ready for a major resolution upgrade without changing bodies
Quick take: The a7cr has the highest resolution at 61mp; the om system om-1 mark ii is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | OM System OM-1 Mark II (2024) | A7CR (2023) |
|---|---|---|
| Price | £1,999 | £3,099 |
| Sensor | 20MP Micro Four Thirds Live MOS | 61.0MP full-frame BSI CMOS |
| Resolution | 20.0MP | 61.0MP |
| Video | 4K/60p, 1080p/240p, 4K HLG | 4K/60p 10-bit, 1080p/120p — S-Log3, S-Cinetone |
| Autofocus | AI subject detection AF (birds, animals, motorsport) | AI subject recognition — phase-detect with human, animal, bird detection |
| Stabilisation | 8.5-stop IBIS | 7-stop IBIS |
| Burst Rate | 120fps with AF tracking | 8fps mechanical, 15fps electronic |
| Battery Life | 520 shots (CIPA) | ~530 shots (CIPA) |
| Weight | 599g body only | 514g body only |
| Dimensions | 134.8 × 91.6 × 72.7mm | 124.0 × 71.1 × 63.4mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | 0.83" OLED EVF, 5.76M dots, 120fps | EVF 0.70× 2.36M-dot |
| Screen | 3.0" fully articulating touchscreen | 3.0" fully articulating touchscreen, 1.03M dots |
| Mount | Micro Four Thirds | Sony E-mount (full-frame) |
| Memory Cards | Dual SD UHS-II | Single CFexpress Type A / SD UHS-II slot |
| Connectivity | USB-C, Wi-Fi, Bluetooth | USB-C 3.2 Gen 2, Wi-Fi 5GHz, Bluetooth 5.0 |
Suitability by genre
| Genre | OM System OM-1 Mark II | A7CR |
|---|---|---|
| Wildlife | — | |
| Sports & Action | — | |
| Landscape | ||
| Travel | ||
| Portrait | ||
| Vlogging & Video | ||
| Street | — | |
| Sports | — |
More comparisons with OM System OM-1 Mark II
Camera family history