EOS R1vs A7R III
Canon
EOS R1 (2024)
Starting from £5999 new
Best for Professional sports, wildlife & photojournalism
View EOS R1
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 Sports, Wildlife & Photojournalism — EOS R1 (2024): Canon's ultimate professional camera — 40fps, a class-leading EVF, and AI AF that simply doesn't miss.
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 R1 (2024)
- Professional sports and news photographers who cannot miss a shot
- Wildlife photographers needing the fastest AF and burst available
- Photojournalists requiring reliable pro-grade build and connectivity
- Canon R3 owners or 1D X Mark III users upgrading to mirrorless flagship
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 a7r iii has the highest resolution at 42mp; the a7r iii is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS R1 (2024) | A7R III (2017) |
|---|---|---|
| Price | £5,999 | £1,799 |
| Sensor | 24.2MP Full-Frame Stacked CMOS | 42.4MP full-frame BSI Exmor R CMOS |
| Resolution | 24.2MP | 42.4MP |
| Video | 6K RAW/60p, 4K/120p, 1080p/240p | 4K/30p (full-frame readout), 1080p/120p |
| Autofocus | Dual Pixel CMOS AF III — 100% coverage, deep learning subject detection | 399 phase-detect + 425 contrast AF points — real-time Eye AF |
| Stabilisation | IBIS — up to 8 stops combined | 5-axis IBIS — 5.5 stops |
| Burst Rate | 40fps electronic, 12fps mechanical | 10fps with AF/AE tracking |
| Battery Life | ~530 shots (CIPA) | ~650 shots (CIPA) |
| Weight | 1470g (with battery) | 650g body only |
| Dimensions | 159.5 × 143.9 × 87.3mm | 126.9 × 95.6 × 73.7mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF, 9.44M dots, 0.90× magnification | EVF, 3.69M dots, 0.78× magnification |
| Screen | 3.2" fully articulating touchscreen | 3.0" touchscreen, tilting |
| Mount | Canon RF mount | Sony FE mount (full-frame E-mount) |
| Memory Cards | Dual CFexpress Type B | Dual SD slots (one UHS-II) |
| Connectivity | USB-C (10Gbps), Wi-Fi 6GHz, Bluetooth, Ethernet, HDMI | USB-C, Bluetooth, Wi-Fi, 3.5mm mic jack |
Suitability by genre
| Genre | EOS R1 | A7R III |
|---|---|---|
| Sports | ||
| Wildlife | — | |
| Photojournalism | — | |
| Vlogging & Video | ||
| Wedding | ||
| Portrait | ||
| Landscape | — | |
| Street | — |
More comparisons with EOS R1
Camera family history