EOS R5 Cvs A7S III
Canon
EOS R5 C (2022)
Starting from £3799 new
Best for Professional video, documentary & hybrid commercial work
View EOS R5 C
Sony
A7S III (2020)
Starting from £2999 new
Best for Professional video & low-light filmmaking
View A7S III
GearScore™ Verdict — Which should you buy?
Professional Video, Documentary & Hybrid Commercial Work — EOS R5 C (2022): Canon's R5 reborn for cinema — 8K RAW unlimited, Cinema EOS colour science, and 45MP stills in a weather-sealed body.
Professional Video & Low-Light Filmmaking — A7S III (2020): If video is your primary discipline, the A7S III is the camera. 4K/120p at 10-bit in a weather-sealed body with a 9.44M dot EVF is an extraordinary package. The 12MP sensor isn't limiting for video — and it's usable at ISO 409,600 in a pinch.
Who should buy what
EOS R5 C (2022)
- Videographers and cinematographers who want Canon Cinema EOS quality in a compact, run-and-gun body
- Hybrid photographers who shoot high-end stills and need 8K RAW video capability in the same body
- Documentary filmmakers who want unlimited recording with a built-in fan
- RF lens owners who want to add a dedicated cinema body to their Canon system
A7S III (2020)
- Filmmakers and videographers who need 4K/120p at 10-bit
- Event videographers who shoot in dark venues regularly
- Documentary filmmakers who need reliable AF and weather sealing
- Hybrid shooters where video is primary and stills are secondary
Quick take: The eos r5 c has the highest resolution at 45mp; the a7s iii is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS R5 C (2022) | A7S III (2020) |
|---|---|---|
| Price | £3,799 | £2,999 |
| Sensor | 45MP full-frame CMOS — Cinema EOS colour science | 12.1MP Full-Frame BSI CMOS (12-bit, back-illuminated) |
| Resolution | 45.0MP | 12.1MP |
| Video | 8K RAW internal, 8K/30p, 4K/120p — Cinema RAW Light, C-Log2, C-Log3 | 4K/120p 10-bit, 4K/60p 10-bit S-Cinetone/S-Log3, 1080p/240p |
| Autofocus | Dual Pixel CMOS AF II — subject tracking with Intelligent AF | Phase-detect, 759 points, real-time Eye AF (human & animal), subject recognition |
| Stabilisation | 5-axis IBIS — 8 stops (with IS lens) | 5.5-stop IBIS |
| Burst Rate | 12fps mechanical, 20fps electronic | 10fps mechanical |
| Battery Life | ~220 shots stills / unlimited video with fan | ~600 shots (CIPA) / ~70min continuous 4K recording |
| Weight | 680g body only | 699g (body, battery, card) |
| Dimensions | 138.5 × 98.0 × 88.0mm | 128.9 × 96.9 × 80.8mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF 0.76× 5.76M-dot OLED | OLED EVF, 9.44M dots, 0.90× magnification — best EVF Sony has made |
| Screen | 3.0" fully articulating touchscreen, 2.1M dots | 3.0" vari-angle touchscreen, 1.44M dots |
| Mount | Canon RF mount (full-frame) | Sony E-mount |
| Memory Cards | Dual CFexpress Type B slots | Dual CFexpress Type A / SD UHS-II (both slots) |
| Connectivity | USB-C, 12G-SDI, HDMI full-size, 3.5mm XLR via adapter, Wi-Fi, Bluetooth | USB-C (USB 3.2 Gen 2), full-size HDMI, Wi-Fi 6, Bluetooth |
Suitability by genre
| Genre | EOS R5 C | A7S III |
|---|---|---|
| Vlogging & Video | — | |
| Portrait | ||
| Landscape | — | |
| Wedding | — | |
| Sports | — | |
| Travel | ||
| Video | — | |
| Wildlife | — | |
| Street | — |
GearScore™ suitability scores are based on aggregated purchaser reviews weighted by photography genre. See how scores are calculated →
More comparisons with EOS R5 C
Camera family history