OM System OM-1 Mark IIvs A7C
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
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.
Compact Travel & Content Creation — A7C (2020): The A7C proves full-frame doesn't have to be bulky. Excellent battery life, reliable Eye AF and a vari-angle screen in a pocketable body is a compelling combination for travel and content creators. The A7C II improved on it, but the original remains a strong value buy.
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
A7C (2020)
- Travel photographers who want full-frame in the smallest possible body
- Content creators who need a flip screen and reliable Eye AF
- Photographers upgrading from APS-C who want to keep a compact kit
- Vloggers who need 4K and great battery life on the road
Quick take: The a7c has the highest resolution at 24mp; the a7c is the most affordable; only the om system om-1 mark ii is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | OM System OM-1 Mark II (2024) | A7C (2020) |
|---|---|---|
| Price | £1,999 | £1,299 |
| Sensor | 20MP Micro Four Thirds Live MOS | 24.2MP Full-Frame Exmor R BSI CMOS |
| Resolution | 20.0MP | 24.2MP |
| Video | 4K/60p, 1080p/240p, 4K HLG | 4K/30p (oversampled), 1080p/120p slow-motion, S-Log2/S-Log3 |
| Autofocus | AI subject detection AF (birds, animals, motorsport) | Phase-detect, 693 points, real-time Eye AF & animal AF |
| Stabilisation | 8.5-stop IBIS | 5-axis IBIS, 5 stops |
| Burst Rate | 120fps with AF tracking | 10fps with AF/AE tracking |
| Battery Life | 520 shots (CIPA) | ~740 shots (CIPA) — outstanding for a Sony mirrorless |
| Weight | 599g body only | 509g (body, battery, card) |
| Dimensions | 134.8 × 91.6 × 72.7mm | 124.0 × 71.1 × 59.7mm |
| Weather Sealed | Yes | No |
| Viewfinder | 0.83" OLED EVF, 5.76M dots, 120fps | None built-in — use rear screen or accessory EVF |
| Screen | 3.0" fully articulating touchscreen | 3.0" vari-angle touchscreen, 921k dots |
| Mount | Micro Four Thirds | Sony E-mount |
| Memory Cards | Dual SD UHS-II | Single SD UHS-II |
| Connectivity | USB-C, Wi-Fi, Bluetooth | USB-C (USB 3.2 Gen 2), Wi-Fi, Bluetooth, NFC |
Suitability by genre
| Genre | OM System OM-1 Mark II | A7C |
|---|---|---|
| Wildlife | ||
| Sports & Action | — | |
| Landscape | — | |
| Travel | ||
| Portrait | ||
| Vlogging & Video | — | |
| Video | — | |
| Street | — |
GearScore™ suitability scores are based on aggregated purchaser reviews weighted by photography genre. See how scores are calculated →
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