EOS R100vs A7S II
Canon
EOS R100 (2023)
Starting from £529 new
Best for First camera / beginner photography
View EOS R100
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?
First Camera / Beginner Photography — EOS R100 (2023): The R100 does the basics well at the lowest possible price point. Its main value is as a gateway into the Canon RF ecosystem — the lenses you buy now will work on any Canon body you upgrade to later. Modest ambitions, reliably met.
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 R100 (2023)
- First-time camera buyers stepping up from a smartphone
- Students and hobbyists wanting an affordable starting point
- Anyone who wants to start investing in Canon RF glass on a budget
- Casual photographers who don't need advanced video or speed
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 r100 has the highest resolution at 24mp; the eos r100 is the most affordable; only the a7s ii is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS R100 (2023) | A7S II (2015) |
|---|---|---|
| Price | £529 | £799 |
| Sensor | 24.1MP APS-C CMOS | 12.1MP full-frame BSI Exmor CMOS |
| Resolution | 24.1MP | 12.1MP |
| Video | 4K/30p (slight crop), 1080p/60p | 4K/30p internal (full sensor readout), 1080p/120p, S-Log2/S-Log3 |
| Autofocus | Dual Pixel CMOS AF, face detection, subject tracking | 169 phase-detect + 25 contrast AF — limited by modern standards |
| Stabilisation | None (no IBIS) | 5-axis IBIS — 4.5 stops (first Sony mirrorless with IBIS) |
| Burst Rate | 6.5fps mechanical | 5fps continuous |
| Battery Life | ~270 shots (CIPA) | ~370 shots (CIPA) |
| Weight | 356g (body, battery, card) | 584g body only |
| Dimensions | 116.3 × 85.5 × 68.8mm | 126.9 × 95.7 × 60.3mm |
| Weather Sealed | No | Yes |
| Viewfinder | EVF, 2.36M dots, 0.59× magnification | EVF, 2.36M dots, 0.71× magnification |
| Screen | 3.0" fixed touchscreen, 1.04M dots | 3.0" tilting LCD, 1.23M dots |
| Mount | Canon RF-mount | Sony FE mount (full-frame E-mount) |
| Memory Cards | Single SD UHS-II | Dual SD UHS-I slots |
| Connectivity | USB-C, Wi-Fi, Bluetooth | USB Micro-B, Bluetooth (via app), Wi-Fi, 3.5mm mic jack |
Suitability by genre
| Genre | EOS R100 | A7S II |
|---|---|---|
| Portrait | ||
| Travel | — | |
| Street | ||
| Video | — | |
| Wildlife | — | |
| Vlogging & Video | — | |
| Low Light | — | |
| Wedding | — | |
| Sports | — |
More comparisons with EOS R100
Camera family history