EOS R6 Mark IIIvs A7S
Canon
EOS R6 Mark III (2025)
Starting from £2799 new
Best for Hybrid photo & video professionals, sports and wildlife shooters
View EOS R6 Mark III
GearScore™ Verdict — Which should you buy?
Hybrid Photo & Video Professionals, Sports And Wildlife Shooters — EOS R6 Mark III (2025): The EOS R6 Mark III takes everything that made the Mark II a hybrid favourite and pushes it further — a faster stacked sensor, smarter autofocus, and genuinely professional video specs. It's the most complete all-rounder in Canon's RF full-frame lineup, sitting just below the R5 II in resolution while matching it for speed.
Astrophotography & Low-Light — A7S (2014): The original A7S pioneered the concept of a camera optimised entirely for low light. Its 12.2MP sensor has enormous photosites — extraordinary high-ISO performance that still holds up. Lacking IBIS and limited to 1080p internally (4K requires external recorder), it is a specialist tool. For astrophotography, event videography, or any scenario where light is genuinely scarce, it remains outstanding.
Who should buy what
EOS R6 Mark III (2025)
- Working photographers who need a single body for both stills and serious video work
- Sports and wildlife shooters who need 40fps burst shooting with reliable subject tracking
- Hybrid content creators producing 4K and 6K footage alongside high-resolution stills
- Enthusiasts upgrading from the EOS R6 Mark II who want faster AF and more resolution
A7S (2014)
- Astrophotographers
- Low-light event videographers
- Filmmakers needing clean high-ISO footage
Quick take: The eos r6 mark iii has the highest resolution at 32mp; the a7s is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS R6 Mark III (2025) | A7S (2014) |
|---|---|---|
| Price | £2,799 | £600 |
| Sensor | 32.5MP full-frame stacked CMOS | 12.2MP Full-Frame BSI CMOS |
| Resolution | 32.5MP | 12.2MP |
| Video | 4K 60fps oversampled from 7K, 6K RAW internal | 1080p/60p internal, 4K via HDMI (external recorder) |
| Autofocus | Dual Pixel CMOS AF II — deep-learning subject detection for people, animals and vehicles, up to 40fps tracking | Phase-detect / contrast-detect hybrid AF |
| Stabilisation | In-body 5-axis IS, up to 8.5 stops | None |
| Burst Rate | 40fps (electronic shutter), 12fps (mechanical) | 5fps |
| Battery Life | ~580 shots (CIPA, LP-E6P) | ~370 shots (CIPA) |
| Weight | 670g (body with battery and card) | 474g (with battery and card) |
| Dimensions | 138.4 × 98.4 × 88.4mm | 126.9 × 94.4 × 48.2mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF, 5.76M-dot, up to 120fps | Electronic, 2.36M dots, 0.71× magnification |
| Screen | 3.2-inch vari-angle touchscreen, 2.1M-dot | 3.0" tilting LCD, 1.23M dots |
| Mount | Canon RF | Sony FE (full-frame E-mount) |
| Memory Cards | Dual SD / SDHC / SDXC (UHS-II) | Single SD / MemoryStick PRO Duo slot |
| Connectivity | USB-C, Wi-Fi 6, Bluetooth 5.0, 2.5GbE | Multi/Micro USB, Wi-Fi, NFC |
Suitability by genre
| Genre | EOS R6 Mark III | A7S |
|---|---|---|
| Sports & Action | ||
| Wildlife | — | |
| Vlogging & Video | ||
| Portrait | ||
| Landscape | ||
| Travel | ||
| Street | ||
| Casual | — | |
| Astrophotography | — |
GearScore™ suitability scores are based on aggregated purchaser reviews weighted by photography genre. See how scores are calculated →
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