OM System OM-1 Mark IIvs A7 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
VS
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, Portrait — A7 II (2014): The camera that proved full-frame IBIS was possible in a compact 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
A7 II (2014)
- Photographers upgrading from APS-C who want full-frame on a budget
- Film shooters adapting vintage lenses (IBIS helps enormously)
Quick take: The a7 ii has the highest resolution at 24mp; the a7 ii is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | OM System OM-1 Mark II (2024) | A7 II (2014) |
|---|---|---|
| Price | £1,999 | £549 |
| Sensor | 20MP Micro Four Thirds Live MOS | Full-frame BSI CMOS 35mm |
| Resolution | 20.0MP | 24.3MP |
| Video | 4K/60p, 1080p/240p, 4K HLG | 1080p 60fps |
| Autofocus | AI subject detection AF (birds, animals, motorsport) | 117-point phase-detect hybrid AF |
| Stabilisation | 8.5-stop IBIS | 5-axis IBIS, 4.5 stops |
| Burst Rate | 120fps with AF tracking | 5fps |
| Battery Life | 520 shots (CIPA) | 350 shots (CIPA) |
| Weight | 599g body only | 599g (body only) |
| Dimensions | 134.8 × 91.6 × 72.7mm | 126.9 × 95.7 × 59.7mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | 0.83" OLED EVF, 5.76M dots, 120fps | EVF 0.71× 2.36M-dot |
| Screen | 3.0" fully articulating touchscreen | 3.0" tilting touchscreen, 1.23M-dot |
| Mount | Micro Four Thirds | Sony E-Mount |
| Memory Cards | Dual SD UHS-II | SD / Memory Stick Pro Duo |
| Connectivity | USB-C, Wi-Fi, Bluetooth | Wi-Fi, NFC, Micro USB, Micro HDMI |
Suitability by genre
| Genre | OM System OM-1 Mark II | A7 II |
|---|---|---|
| Wildlife | — | |
| Sports & Action | — | |
| Landscape | — | |
| Travel | — | |
| Portrait | — | |
| Vlogging & Video | — |
More comparisons with OM System OM-1 Mark II
Camera family history