OM-1vs A7
GearScore™ Verdict — Which should you buy?
Wildlife, Sport, Outdoor — OM-1 (2022): OM System's statement camera — class-leading weather sealing and the best IBIS in the business.
Camera History & Full-Frame Introduction — A7 (2013): The camera that changed photography — the world's first compact full-frame mirrorless, the A7 launched a product family that redefined what was possible.
Who should buy what
OM-1 (2022)
- Wildlife and bird photographers who need fast burst and pro weather sealing
- Outdoor photographers who work in challenging conditions
A7 (2013)
- Photographers interested in the camera that launched the full-frame mirrorless era
- Budget-conscious buyers who want to experience full-frame image quality at minimal cost
- Sony FE system users who want the original A7 for sentimental or historical value
- Those adapting vintage lenses who want full-frame with phase-detect AF at low cost
Quick take: The a7 has the highest resolution at 24mp; the a7 is the most affordable; only the om-1 is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | OM-1 (2022) | A7 (2013) |
|---|---|---|
| Price | £1,299 | £299 |
| Sensor | Micro Four Thirds Live MOS stacked BSI | 24.3MP Full-Frame CMOS |
| Resolution | 20.4MP | 24.3MP |
| Video | 4K 60fps 10-bit | 1080p/60p |
| Autofocus | 1053-point cross-type phase-detect, AI subject recognition | 117 phase-detect + 25 contrast-detect AF points |
| Stabilisation | 5-axis IBIS, 7.0 stops (8 stops with sync IS) | None |
| Burst Rate | 10fps mechanical, 50fps electronic, 120fps Pro Capture | 5fps |
| Battery Life | 520 shots (CIPA) | ~340 shots (CIPA) |
| Weight | 599g (body only) | 474g (with battery and card) |
| Dimensions | 134.8 × 91.6 × 72.7mm | 126.9 × 94.4 × 48.2mm |
| Weather Sealed | Yes | No |
| Viewfinder | EVF 0.83× 5.76M-dot | EVF, OLED 2.36M dots, 0.71× magnification |
| Screen | 3.0" fully articulating touchscreen, 1.62M-dot | 3.0" fixed LCD, 1.23M dots (no tilt, no touch) |
| Mount | Micro Four Thirds | Sony FE (full-frame E-mount) |
| Memory Cards | 2× SD UHS-II / CFexpress Type B | Single SD UHS-I slot |
| Connectivity | Wi-Fi 5GHz, Bluetooth 5.0, USB-C 3.1, HDMI, 3.5mm mic/headphone | USB, Wi-Fi, NFC |
Suitability by genre
| Genre | OM-1 | A7 |
|---|---|---|
| Wildlife | — | |
| Sports & Action | ||
| Landscape | ||
| Travel | ||
| Portrait | ||
| Casual | — | |
| Astrophotography | — | |
| Street | — | |
| Vlogging & Video | — |
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