PowerShot G7X Mark IIIvs A7R III
Canon
PowerShot G7X Mark III (2019)
Starting from £749 new
Best for Vlogging, content creation & travel video
View PowerShot G7X Mark III
Sony
A7R III (2017)
Starting from £1799 new
Best for Landscape, studio & commercial photography
View A7R III
GearScore™ Verdict — Which should you buy?
Vlogging, Content Creation & Travel Video — PowerShot G7X Mark III (2019): The finest vlogging compact available — pocket-sized 4K, a flip screen, mic input, and USB live streaming in one remarkably capable package.
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
PowerShot G7X Mark III (2019)
- Vloggers and content creators who need 4K video, a flip screen, and a mic input in a pocket-sized camera
- Travellers who want the best possible compact video quality without carrying an interchangeable-lens system
- Live streamers who want USB streaming capability built into a compact camera
- Smartphone upgraders who want significantly better video quality in something nearly as pocketable
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 powershot g7x mark iii is the most affordable; only the a7r iii is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | PowerShot G7X Mark III (2019) | A7R III (2017) |
|---|---|---|
| Price | £749 | £1,799 |
| Sensor | 20.1MP 1-inch BSI-CMOS | 42.4MP full-frame BSI Exmor R CMOS |
| Resolution | 20.1MP | 42.4MP |
| Video | 4K/30p, 1080p/120p — no crop in 4K | 4K/30p (full-frame readout), 1080p/120p |
| Autofocus | Dual Pixel CMOS AF — fast, reliable, with Eye AF | 399 phase-detect + 425 contrast AF points — real-time Eye AF |
| Stabilisation | Optical IS — lens-based | 5-axis IBIS — 5.5 stops |
| Burst Rate | 20fps (with fixed AF/AE) | 10fps with AF/AE tracking |
| Battery Life | ~235 shots (CIPA) | ~650 shots (CIPA) |
| Weight | 304g | 650g body only |
| Dimensions | 105.5 × 60.9 × 41.4mm | 126.9 × 95.6 × 73.7mm |
| Weather Sealed | No | Yes |
| Viewfinder | None | EVF, 3.69M dots, 0.78× magnification |
| Screen | 3.0" fully tilting touchscreen (180° flip for self-facing) | 3.0" touchscreen, tilting |
| Mount | Fixed 24-100mm equivalent f/1.8-2.8 lens | Sony FE mount (full-frame E-mount) |
| Memory Cards | Single SD UHS-I slot | Dual SD slots (one UHS-II) |
| Connectivity | USB-C, Bluetooth, Wi-Fi, 3.5mm mic jack, USB live streaming | USB-C, Bluetooth, Wi-Fi, 3.5mm mic jack |
Suitability by genre
| Genre | PowerShot G7X Mark III | A7R III |
|---|---|---|
| Vlogging & Video | ||
| Travel | — | |
| Street | ||
| Portrait | ||
| Landscape | ||
| Sports | ||
| Wedding | — |
More comparisons with PowerShot G7X Mark III