EOS R5vs A7S III
Canon
EOS R5 (2020)
Starting from £2499 new
Best for Professional hybrid shooters, portrait & wildlife
View EOS R5
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 Hybrid Shooters, Portrait & Wildlife — EOS R5 (2020): A landmark camera — 8K video and 45MP in one body set the standard for what mirrorless could be.
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 (2020)
- Professional photographers who need both resolution and video in one body
- Wildlife and sports photographers who want top AF with 20fps burst
- Hybrid shooters who need 8K or 4K/120p alongside high-resolution stills
- R5 Mark II buyers on a budget — the R5 still delivers exceptional results
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 has the highest resolution at 45mp; the eos r5 is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS R5 (2020) | A7S III (2020) |
|---|---|---|
| Price | £2,499 | £2,999 |
| Sensor | 45MP Full-Frame CMOS | 12.1MP Full-Frame BSI CMOS (12-bit, back-illuminated) |
| Resolution | 45.0MP | 12.1MP |
| Video | 8K RAW/30p, 4K/120p, 1080p/120p | 4K/120p 10-bit, 4K/60p 10-bit S-Cinetone/S-Log3, 1080p/240p |
| Autofocus | Dual Pixel CMOS AF II — 1053 AF zones, subject/animal detection | Phase-detect, 759 points, real-time Eye AF (human & animal), subject recognition |
| Stabilisation | IBIS — up to 8 stops combined with IS lenses | 5.5-stop IBIS |
| Burst Rate | 12fps mechanical, 20fps electronic | 10fps mechanical |
| Battery Life | ~320 shots (CIPA) | ~600 shots (CIPA) / ~70min continuous 4K recording |
| Weight | 650g (with battery) | 699g (body, battery, card) |
| Dimensions | 138.5 × 97.5 × 88mm | 128.9 × 96.9 × 80.8mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF, 5.76M dots, 0.76× magnification | OLED EVF, 9.44M dots, 0.90× magnification — best EVF Sony has made |
| Screen | 3.15" fully articulating touchscreen | 3.0" vari-angle touchscreen, 1.44M dots |
| Mount | Canon RF mount | Sony E-mount |
| Memory Cards | CFexpress Type B + SD UHS-II | Dual CFexpress Type A / SD UHS-II (both slots) |
| Connectivity | USB-C, Wi-Fi, Bluetooth, HDMI | USB-C (USB 3.2 Gen 2), full-size HDMI, Wi-Fi 6, Bluetooth |
Suitability by genre
| Genre | EOS R5 | A7S III |
|---|---|---|
| Portrait | ||
| Wildlife | ||
| Vlogging & Video | — | |
| Sports | — | |
| Landscape | — | |
| Wedding | — | |
| Video | — | |
| Street | — | |
| Travel | — |
More comparisons with EOS R5
Camera family history