A7 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?
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.
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
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
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 a7 iv has the highest resolution at 33mp; the a7 iv is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | A7 IV (2021) | FX3 (2021) |
|---|---|---|
| Price | £2,299 | £3,799 |
| Sensor | 33MP Full-frame BSI Exmor R CMOS | 12.1MP full-frame BSI Exmor R CMOS (same as A7S III) |
| Resolution | 33.0MP | 12.1MP |
| Video | 4K/60p oversampled, 10-bit internal, S-Log3, S-Cinetone | 4K/120p, 4K/60p 10-bit, 12-bit RAW output, S-Log3, S-Cinetone |
| Autofocus | 759-point phase-detect, AI subject recognition | Real-time tracking with subject recognition (human, animal) |
| Stabilisation | 5-axis IBIS, 5.5 stops | 5-axis IBIS — 5 stops |
| Burst Rate | 10fps mechanical, 30fps electronic | 10fps mechanical, 10fps electronic |
| Battery Life | ~580 shots (CIPA) | ~640 shots (CIPA) |
| Weight | 659g body only | 715g body only (with XLR handle) |
| Dimensions | 131.3 × 96.4 × 79.8mm | 129.7 × 78.0 × 84.5mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF, 3.69M dots, 0.78× magnification | None — monitor/external EVF use only |
| Screen | 3.0" vari-angle touchscreen | 3.0" touchscreen, fully articulating |
| Mount | Sony FE (full-frame E-mount) | Sony FE mount (full-frame E-mount) |
| Memory Cards | Dual slots: CFexpress Type A + SD UHS-II | Dual CFexpress Type A / SD UHS-II slots |
| Connectivity | USB-C (3.2 Gen 2), Bluetooth, Wi-Fi | USB-C (10Gbps), full-size HDMI, XLR via handle, Bluetooth, Wi-Fi |
Suitability by genre
| Genre | A7 IV | FX3 |
|---|---|---|
| Studio Portraits | — | |
| Outdoor Portraits | — | |
| Wedding & Events | — | |
| Vlogging & Video | ||
| Landscape | — | |
| Sports & Action | — | |
| Portrait | — | |
| Low Light | — | |
| Street | — | |
| Wedding | — | |
| Travel | — |
More comparisons with A7 IV
Camera family history