OM System OM-1 Mark IIvs FX3
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
FX3 (2021)
Starting from £3799 new
Best for Professional video, documentary & cinematic filmmaking
View FX3
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.
Professional Video, Documentary & Cinematic Filmmaking — FX3 (2021): The definitive run-and-gun cinema camera — A7S III sensor quality in a body built specifically for video professionals.
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
FX3 (2021)
- Professional videographers and filmmakers who need cinema-quality colour science in a compact body
- Documentary and run-and-gun shooters who need 4K/120p and built-in XLR audio
- Sony A7S III owners who want a purpose-built video body alongside their stills camera
- Gimbal and drone operators who need a compact full-frame cinema camera
Quick take: The om system om-1 mark ii has the highest resolution at 20mp; 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) | FX3 (2021) |
|---|---|---|
| Price | £1,999 | £3,799 |
| Sensor | 20MP Micro Four Thirds Live MOS | 12.1MP full-frame BSI Exmor R CMOS (same as A7S III) |
| Resolution | 20.0MP | 12.1MP |
| Video | 4K/60p, 1080p/240p, 4K HLG | 4K/120p, 4K/60p 10-bit, 12-bit RAW output, S-Log3, S-Cinetone |
| Autofocus | AI subject detection AF (birds, animals, motorsport) | Real-time tracking with subject recognition (human, animal) |
| Stabilisation | 8.5-stop IBIS | 5-axis IBIS — 5 stops |
| Burst Rate | 120fps with AF tracking | 10fps mechanical, 10fps electronic |
| Battery Life | 520 shots (CIPA) | ~640 shots (CIPA) |
| Weight | 599g body only | 715g body only (with XLR handle) |
| Dimensions | 134.8 × 91.6 × 72.7mm | 129.7 × 78.0 × 84.5mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | 0.83" OLED EVF, 5.76M dots, 120fps | None — monitor/external EVF use only |
| Screen | 3.0" fully articulating touchscreen | 3.0" touchscreen, fully articulating |
| Mount | Micro Four Thirds | Sony FE mount (full-frame E-mount) |
| Memory Cards | Dual SD UHS-II | Dual CFexpress Type A / SD UHS-II slots |
| Connectivity | USB-C, Wi-Fi, Bluetooth | USB-C (10Gbps), full-size HDMI, XLR via handle, Bluetooth, Wi-Fi |
Suitability by genre
| Genre | OM System OM-1 Mark II | FX3 |
|---|---|---|
| Wildlife | — | |
| Sports & Action | — | |
| Landscape | — | |
| Travel | ||
| Portrait | ||
| Vlogging & Video | ||
| Low Light | — | |
| Street | — | |
| Wedding | — |
More comparisons with OM System OM-1 Mark II
Camera family history