EOS R5vs A7R III
Canon
EOS R5 (2020)
Starting from £2499 new
Best for Professional hybrid shooters, portrait & wildlife
View EOS R5
VS
Sony
A7R III (2017)
Starting from £1799 new
Best for Landscape, studio & commercial photography
View A7R 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.
Landscape, Studio & Commercial Photography — A7R III (2017): The camera that converted professionals to mirrorless — 42MP, IBIS, and 10fps in a body that still competes today.
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
A7R III (2017)
- Landscape and studio photographers who need 42MP resolution at a used-price discount vs A7R IV
- Canon/Nikon DSLR professionals considering a mirrorless switch at a lower investment
- Commercial and product photographers who want full-frame resolution with IBIS for handheld work
- Portrait photographers who want the sharpest possible full-frame files for large print work
Quick take: The eos r5 has the highest resolution at 45mp; the a7r iii is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS R5 (2020) | A7R III (2017) |
|---|---|---|
| Price | £2,499 | £1,799 |
| Sensor | 45MP Full-Frame CMOS | 42.4MP full-frame BSI Exmor R CMOS |
| Resolution | 45.0MP | 42.4MP |
| Video | 8K RAW/30p, 4K/120p, 1080p/120p | 4K/30p (full-frame readout), 1080p/120p |
| Autofocus | Dual Pixel CMOS AF II — 1053 AF zones, subject/animal detection | 399 phase-detect + 425 contrast AF points — real-time Eye AF |
| Stabilisation | IBIS — up to 8 stops combined with IS lenses | 5-axis IBIS — 5.5 stops |
| Burst Rate | 12fps mechanical, 20fps electronic | 10fps with AF/AE tracking |
| Battery Life | ~320 shots (CIPA) | ~650 shots (CIPA) |
| Weight | 650g (with battery) | 650g body only |
| Dimensions | 138.5 × 97.5 × 88mm | 126.9 × 95.6 × 73.7mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF, 5.76M dots, 0.76× magnification | EVF, 3.69M dots, 0.78× magnification |
| Screen | 3.15" fully articulating touchscreen | 3.0" touchscreen, tilting |
| Mount | Canon RF mount | Sony FE mount (full-frame E-mount) |
| Memory Cards | CFexpress Type B + SD UHS-II | Dual SD slots (one UHS-II) |
| Connectivity | USB-C, Wi-Fi, Bluetooth, HDMI | USB-C, Bluetooth, Wi-Fi, 3.5mm mic jack |
Suitability by genre
| Genre | EOS R5 | A7R III |
|---|---|---|
| Portrait | ||
| Wildlife | — | |
| Vlogging & Video | ||
| Sports | ||
| Landscape | ||
| Wedding | ||
| Street | — |
More comparisons with EOS R5
Camera family history