A7R IVvs FX3
VS
Sony
FX3 (2021)
Starting from £3799 new
Best for Professional video, documentary & cinematic filmmaking
View FX3
GearScore™ Verdict — Which should you buy?
Landscape, Studio, Commercial — A7R IV (2019): 61MP in a mirrorless body — the resolution benchmark.
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
A7R IV (2019)
- Landscape photographers who print large
- Studio shooters needing maximum detail
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 a7r iv has the highest resolution at 61mp; the a7r iv is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | A7R IV (2019) | FX3 (2021) |
|---|---|---|
| Price | £2,199 | £3,799 |
| Sensor | Full-frame BSI Exmor R CMOS 35mm | 12.1MP full-frame BSI Exmor R CMOS (same as A7S III) |
| Resolution | 61.0MP | 12.1MP |
| Video | 4K 30fps | 4K/120p, 4K/60p 10-bit, 12-bit RAW output, S-Log3, S-Cinetone |
| Autofocus | 567-point phase-detect, real-time tracking | Real-time tracking with subject recognition (human, animal) |
| Stabilisation | 5-axis IBIS, 5.5 stops | 5-axis IBIS — 5 stops |
| Burst Rate | 10fps | 10fps mechanical, 10fps electronic |
| Battery Life | 670 shots (CIPA) | ~640 shots (CIPA) |
| Weight | 665g (body only) | 715g body only (with XLR handle) |
| Dimensions | 128.9 × 96.4 × 77.5mm | 129.7 × 78.0 × 84.5mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF 0.78× 5.76M-dot | None — monitor/external EVF use only |
| Screen | 3.0" tilting touchscreen, 1.44M-dot | 3.0" touchscreen, fully articulating |
| Mount | Sony E-Mount | Sony FE mount (full-frame E-mount) |
| Memory Cards | 2× SD UHS-II / CFexpress Type A | Dual CFexpress Type A / SD UHS-II slots |
| Connectivity | Wi-Fi 5GHz, Bluetooth 4.1, USB-C 3.2 | USB-C (10Gbps), full-size HDMI, XLR via handle, Bluetooth, Wi-Fi |
Suitability by genre
| Genre | A7R IV | FX3 |
|---|---|---|
| Vlogging & Video | — | |
| Portrait | — | |
| Low Light | — | |
| Street | — | |
| Wedding | — | |
| Travel | — |
More comparisons with A7R IV
Camera family history