EOS R7vs A7Cvs A7S III
Which should you buy?
Wildlife, Sports & Action — EOS R7 (2022): The EOS R7 is one of the most complete APS-C cameras ever made. It combines a class-leading resolution sensor with best-in-class IBIS, 4K/60p video, weather sealing and 15fps burst. For wildlife, sports and action photographers on an APS-C budget, nothing else comes close.
Compact Travel & Content Creation — A7C (2020): The A7C proves full-frame doesn't have to be bulky. Excellent battery life, reliable Eye AF and a vari-angle screen in a pocketable body is a compelling combination for travel and content creators. The A7C II improved on it, but the original remains a strong value buy.
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
EOS R7 (2022)
- Wildlife photographers who need reach, weather sealing and fast burst
- Sports shooters upgrading from entry-level APS-C bodies
- Video creators who need uncropped 4K/60p without a full-frame budget
- Canon DSLR users looking to move to RF mount
A7C (2020)
- Travel photographers who want full-frame in the smallest possible body
- Content creators who need a flip screen and reliable Eye AF
- Photographers upgrading from APS-C who want to keep a compact kit
- Vloggers who need 4K and great battery life on the road
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 eos r7 has the highest resolution at 32mp; the a7c is the most affordable; only the eos r7, a7s iii are weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS R7 (2022) | A7C (2020) | A7S III (2020) |
|---|---|---|---|
| Price | £1,399 | £1,299 | £2,999 |
| Sensor | 32.5MP APS-C CMOS | 24.2MP Full-Frame Exmor R BSI CMOS | 12.1MP Full-Frame BSI CMOS (12-bit, back-illuminated) |
| Resolution | 32.5MP | 24.2MP | 12.1MP |
| Video | 4K/60p (uncropped), 4K/30p (oversampled from 7K), 1080p/120p | 4K/30p (oversampled), 1080p/120p slow-motion, S-Log2/S-Log3 | 4K/120p 10-bit, 4K/60p 10-bit S-Cinetone/S-Log3, 1080p/240p |
| Autofocus | Dual Pixel CMOS AF II, 651 AF zones, subject recognition (people, animals, vehicles) | Phase-detect, 693 points, real-time Eye AF & animal AF | Phase-detect, 759 points, real-time Eye AF (human & animal), subject recognition |
| Stabilisation | 7-stop IBIS (8 stops with compatible IS lenses) | 5-axis IBIS, 5 stops | 5.5-stop IBIS |
| Burst Rate | 15fps mechanical, 30fps electronic (with blackout) | 10fps with AF/AE tracking | 10fps mechanical |
| Battery Life | ~770 shots (CIPA) | ~740 shots (CIPA) — outstanding for a Sony mirrorless | ~600 shots (CIPA) / ~70min continuous 4K recording |
| Weight | 612g (body, battery, card) | 509g (body, battery, card) | 699g (body, battery, card) |
| Dimensions | 132.0 × 90.4 × 91.7mm | 124.0 × 71.1 × 59.7mm | 128.9 × 96.9 × 80.8mm |
| Weather Sealed | Yes | No | Yes |
| Viewfinder | EVF, 2.36M dots, 0.72× magnification | None built-in — use rear screen or accessory EVF | OLED EVF, 9.44M dots, 0.90× magnification — best EVF Sony has made |
| Screen | 3.0" vari-angle touchscreen, 1.62M dots | 3.0" vari-angle touchscreen, 921k dots | 3.0" vari-angle touchscreen, 1.44M dots |
| Mount | Canon RF-mount | Sony E-mount | Sony E-mount |
| Memory Cards | Dual SD UHS-II | Single SD UHS-II | Dual CFexpress Type A / SD UHS-II (both slots) |
| Connectivity | USB-C (USB 3.2 Gen 2), Wi-Fi, Bluetooth | USB-C (USB 3.2 Gen 2), Wi-Fi, Bluetooth, NFC | USB-C (USB 3.2 Gen 2), full-size HDMI, Wi-Fi 6, Bluetooth |
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