PowerShot G7X Mark IIIvs A7S III
Canon
PowerShot G7X Mark III (2019)
Starting from £749 new
Best for Vlogging, content creation & travel video
View PowerShot G7X Mark III
Sony
A7S III (2020)
Starting from £2999 new
Best for Professional video & low-light filmmaking
View A7S 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.
Professional Video & Low-Light Filmmaking — A7S III (2020): If video is your primary discipline, the A7S III is the camera. 4K/120p at 10-bit in a weather-sealed body with a 9.44M dot EVF is an extraordinary package. The 12MP sensor isn't limiting for video — and it's usable at ISO 409,600 in a pinch.
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
A7S III (2020)
- Filmmakers and videographers who need 4K/120p at 10-bit
- Event videographers who shoot in dark venues regularly
- Documentary filmmakers who need reliable AF and weather sealing
- Hybrid shooters where video is primary and stills are secondary
Quick take: The powershot g7x mark iii has the highest resolution at 20mp; the powershot g7x mark iii is the most affordable; only the a7s iii is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | PowerShot G7X Mark III (2019) | A7S III (2020) |
|---|---|---|
| Price | £749 | £2,999 |
| Sensor | 20.1MP 1-inch BSI-CMOS | 12.1MP Full-Frame BSI CMOS (12-bit, back-illuminated) |
| Resolution | 20.1MP | 12.1MP |
| Video | 4K/30p, 1080p/120p — no crop in 4K | 4K/120p 10-bit, 4K/60p 10-bit S-Cinetone/S-Log3, 1080p/240p |
| Autofocus | Dual Pixel CMOS AF — fast, reliable, with Eye AF | Phase-detect, 759 points, real-time Eye AF (human & animal), subject recognition |
| Stabilisation | Optical IS — lens-based | 5.5-stop IBIS |
| Burst Rate | 20fps (with fixed AF/AE) | 10fps mechanical |
| Battery Life | ~235 shots (CIPA) | ~600 shots (CIPA) / ~70min continuous 4K recording |
| Weight | 304g | 699g (body, battery, card) |
| Dimensions | 105.5 × 60.9 × 41.4mm | 128.9 × 96.9 × 80.8mm |
| Weather Sealed | No | Yes |
| Viewfinder | None | OLED EVF, 9.44M dots, 0.90× magnification — best EVF Sony has made |
| Screen | 3.0" fully tilting touchscreen (180° flip for self-facing) | 3.0" vari-angle touchscreen, 1.44M dots |
| Mount | Fixed 24-100mm equivalent f/1.8-2.8 lens | Sony E-mount |
| Memory Cards | Single SD UHS-I slot | Dual CFexpress Type A / SD UHS-II (both slots) |
| Connectivity | USB-C, Bluetooth, Wi-Fi, 3.5mm mic jack, USB live streaming | USB-C (USB 3.2 Gen 2), full-size HDMI, Wi-Fi 6, Bluetooth |
Suitability by genre
| Genre | PowerShot G7X Mark III | A7S III |
|---|---|---|
| Vlogging & Video | — | |
| Travel | ||
| Street | ||
| Portrait | ||
| Landscape | — | |
| Sports | — | |
| Video | — | |
| Wildlife | — |
More comparisons with PowerShot G7X Mark III
Camera family history