OM-1vs A7 IV
VS
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.
Portrait & Wedding Photography — A7 IV (2021): The full-frame portrait benchmark — 33MP, AI Eye AF, and exceptional skin-tone rendering in a pro-grade hybrid body.
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 IV (2021)
- Working photographers who want a reliable full-frame all-rounder
- Portrait, wedding, and event photographers needing 33MP and fast AF
- A7 III owners ready for a major upgrade in resolution, AF, and video
- Hybrid shooters who want 4K/60p and 33MP stills in one dependable body
Quick take: The a7 iv has the highest resolution at 33mp; the om-1 is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | OM-1 (2022) | A7 IV (2021) |
|---|---|---|
| Price | £1,299 | £2,299 |
| Sensor | Micro Four Thirds Live MOS stacked BSI | 33MP Full-frame BSI Exmor R CMOS |
| Resolution | 20.4MP | 33.0MP |
| Video | 4K 60fps 10-bit | 4K/60p oversampled, 10-bit internal, S-Log3, S-Cinetone |
| Autofocus | 1053-point cross-type phase-detect, AI subject recognition | 759-point phase-detect, AI subject recognition |
| Stabilisation | 5-axis IBIS, 7.0 stops (8 stops with sync IS) | 5-axis IBIS, 5.5 stops |
| Burst Rate | 10fps mechanical, 50fps electronic, 120fps Pro Capture | 10fps mechanical, 30fps electronic |
| Battery Life | 520 shots (CIPA) | ~580 shots (CIPA) |
| Weight | 599g (body only) | 659g body only |
| Dimensions | 134.8 × 91.6 × 72.7mm | 131.3 × 96.4 × 79.8mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF 0.83× 5.76M-dot | EVF, 3.69M dots, 0.78× magnification |
| Screen | 3.0" fully articulating touchscreen, 1.62M-dot | 3.0" vari-angle touchscreen |
| Mount | Micro Four Thirds | Sony FE (full-frame E-mount) |
| Memory Cards | 2× SD UHS-II / CFexpress Type B | Dual slots: CFexpress Type A + SD UHS-II |
| Connectivity | Wi-Fi 5GHz, Bluetooth 5.0, USB-C 3.1, HDMI, 3.5mm mic/headphone | USB-C (3.2 Gen 2), Bluetooth, Wi-Fi |
Suitability by genre
| Genre | OM-1 | A7 IV |
|---|---|---|
| Wildlife | — | |
| Sports & Action | ||
| Landscape | ||
| Travel | — | |
| Portrait | — | |
| Casual | — | |
| Astrophotography | — | |
| Studio Portraits | — | |
| Outdoor Portraits | — | |
| Wedding & Events | — | |
| Vlogging & Video | — |
More comparisons with OM-1
Camera family history