EOS Rvs A7R III
Canon
EOS R (2018)
Starting from £799 new
Best for Entry to full-frame mirrorless & RF lens exploration
View EOS R
VS
Sony
A7R III (2017)
Starting from £1799 new
Best for Landscape, studio & commercial photography
View A7R III
GearScore™ Verdict — Which should you buy?
Entry To Full-Frame Mirrorless & Rf Lens Exploration — EOS R (2018): The RF mount's founding camera — 30MP, Dual Pixel CMOS AF, and the proof-of-concept that launched Canon's mirrorless era.
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 R (2018)
- Canon DSLR users wanting to enter the RF ecosystem at the lowest full-frame price
- EF lens collectors who want an affordable RF body to use with the EF-RF adapter
- Photographers stepping up from APS-C who want full-frame quality on a budget
- RF system fans who want a second body without full EOS R6 pricing
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 r is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS R (2018) | A7R III (2017) |
|---|---|---|
| Price | £799 | £1,799 |
| Sensor | 30.3MP full-frame CMOS | 42.4MP full-frame BSI Exmor R CMOS |
| Resolution | 30.3MP | 42.4MP |
| Video | 4K/30p (1.7× crop), 1080p/60p | 4K/30p (full-frame readout), 1080p/120p |
| Autofocus | Dual Pixel CMOS AF — 5655 AF areas, Eye AF | 399 phase-detect + 425 contrast AF points — real-time Eye AF |
| Stabilisation | None | 5-axis IBIS — 5.5 stops |
| Burst Rate | 8fps continuous (5fps with AF/AE) | 10fps with AF/AE tracking |
| Battery Life | ~350 shots (CIPA) | ~650 shots (CIPA) |
| Weight | 660g body only | 650g body only |
| Dimensions | 135.8 × 98.3 × 84.4mm | 126.9 × 95.6 × 73.7mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF, 3.69M dots, 0.71× magnification | EVF, 3.69M dots, 0.78× magnification |
| Screen | 3.0" touchscreen, tilting | 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, 3.5mm mic jack | USB-C, Bluetooth, Wi-Fi, 3.5mm mic jack |
Suitability by genre
| Genre | EOS R | A7R III |
|---|---|---|
| Portrait | ||
| Landscape | ||
| Travel | — | |
| Wedding | ||
| Vlogging & Video | ||
| Sports | ||
| Street | — |
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