EOS R8vs A7R III
VS
Sony
A7R III (2017)
Starting from £1799 new
Best for Landscape, studio & commercial photography
View A7R III
GearScore™ Verdict — Which should you buy?
Full-Frame Entry — EOS R8 (2023): Canon's most affordable full-frame mirrorless — 4K/60p 10-bit and class-leading Dual Pixel AF at an accessible entry price.
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 R8 (2023)
- Photographers wanting full-frame image quality at the lowest RF price
- EOS RP owners upgrading to better autofocus and modern video specs
- Beginners who want to start on full-frame without overspending
- Travel photographers who want a lightweight full-frame RF body
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 eos r8 is the most affordable; only the a7r iii is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS R8 (2023) | A7R III (2017) |
|---|---|---|
| Price | £1,099 | £1,799 |
| Sensor | 24.2MP Full-frame BSI CMOS | 42.4MP full-frame BSI Exmor R CMOS |
| Resolution | 24.2MP | 42.4MP |
| Video | 4K/60p oversampled 10-bit, FHD/180p | 4K/30p (full-frame readout), 1080p/120p |
| Autofocus | Dual Pixel CMOS AF II, 1053 zones, eye/face/subject tracking | 399 phase-detect + 425 contrast AF points — real-time Eye AF |
| Stabilisation | None (no IBIS) | 5-axis IBIS — 5.5 stops |
| Burst Rate | 6fps mechanical, 40fps electronic | 10fps with AF/AE tracking |
| Battery Life | ~220 shots (CIPA) | ~650 shots (CIPA) |
| Weight | 461g body only | 650g body only |
| Dimensions | 132.5 × 86.1 × 70.0mm | 126.9 × 95.6 × 73.7mm |
| Weather Sealed | No | Yes |
| Viewfinder | EVF, 2.36M dots, 0.59× | EVF, 3.69M dots, 0.78× magnification |
| Screen | 3.0" fully articulating touchscreen | 3.0" touchscreen, tilting |
| Mount | Canon RF mount (full-frame) | Sony FE mount (full-frame E-mount) |
| Memory Cards | Single SD UHS-II slot | Dual SD slots (one UHS-II) |
| Connectivity | USB-C, Bluetooth, Wi-Fi | USB-C, Bluetooth, Wi-Fi, 3.5mm mic jack |
Suitability by genre
| Genre | EOS R8 | A7R III |
|---|---|---|
| Portrait | ||
| Vlogging & Video | ||
| Street | ||
| Wedding & Events | — | |
| Landscape | ||
| Sports & Action | — | |
| Wedding | — | |
| Sports | — |
More comparisons with EOS R8
Camera family history