EOS R6 Mark IIIvs A7S II
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
Sony
A7S II (2015)
Starting from £799 new
Best for Low-light video, documentary & available-light filmmaking
View A7S II
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.
Low-Light Video, Documentary & Available-Light Filmmaking — A7S II (2015): A landmark in mirrorless history — the first Sony with IBIS and internal 4K, its low-light video capability still impresses today at a used-market price.
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 II (2015)
- Filmmakers and videographers who want legendary low-light performance at a used-price discount
- Documentary shooters working in unpredictable available light conditions
- A7S III shooters who want a second Sony FE body for backup or B-camera use
- Budget-conscious video producers who want full-frame 4K with S-Log at an accessible price
Quick take: The eos r6 mark iii has the highest resolution at 32mp; the a7s ii is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS R6 Mark III (2025) | A7S II (2015) |
|---|---|---|
| Price | £2,799 | £799 |
| Sensor | 32.5MP full-frame stacked CMOS | 12.1MP full-frame BSI Exmor CMOS |
| Resolution | 32.5MP | 12.1MP |
| Video | 4K 60fps oversampled from 7K, 6K RAW internal | 4K/30p internal (full sensor readout), 1080p/120p, S-Log2/S-Log3 |
| Autofocus | Dual Pixel CMOS AF II — deep-learning subject detection for people, animals and vehicles, up to 40fps tracking | 169 phase-detect + 25 contrast AF — limited by modern standards |
| Stabilisation | In-body 5-axis IS, up to 8.5 stops | 5-axis IBIS — 4.5 stops (first Sony mirrorless with IBIS) |
| Burst Rate | 40fps (electronic shutter), 12fps (mechanical) | 5fps continuous |
| Battery Life | ~580 shots (CIPA, LP-E6P) | ~370 shots (CIPA) |
| Weight | 670g (body with battery and card) | 584g body only |
| Dimensions | 138.4 × 98.4 × 88.4mm | 126.9 × 95.7 × 60.3mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF, 5.76M-dot, up to 120fps | EVF, 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 mount (full-frame E-mount) |
| Memory Cards | Dual SD / SDHC / SDXC (UHS-II) | Dual SD UHS-I slots |
| Connectivity | USB-C, Wi-Fi 6, Bluetooth 5.0, 2.5GbE | USB Micro-B, Bluetooth (via app), Wi-Fi, 3.5mm mic jack |
Suitability by genre
| Genre | EOS R6 Mark III | A7S II |
|---|---|---|
| Sports & Action | — | |
| Wildlife | — | |
| Vlogging & Video | ||
| Portrait | ||
| Landscape | — | |
| Travel | — | |
| Street | ||
| Casual | — | |
| Low Light | — | |
| Wedding | — | |
| Sports | — |
GearScore™ suitability scores are based on aggregated purchaser reviews weighted by photography genre. See how scores are calculated →
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Camera family history