EOS R100vs A7S
Canon
EOS R100 (2023)
Starting from £529 new
Best for First camera / beginner photography
View EOS R100
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.
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 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 (2014)
- Astrophotographers
- Low-light event videographers
- Filmmakers needing clean high-ISO footage
Quick take: The eos r100 has the highest resolution at 24mp; the eos r100 is the most affordable; only the a7s is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS R100 (2023) | A7S (2014) |
|---|---|---|
| Price | £529 | £600 |
| Sensor | 24.1MP APS-C CMOS | 12.2MP Full-Frame BSI CMOS |
| Resolution | 24.1MP | 12.2MP |
| Video | 4K/30p (slight crop), 1080p/60p | 1080p/60p internal, 4K via HDMI (external recorder) |
| Autofocus | Dual Pixel CMOS AF, face detection, subject tracking | Phase-detect / contrast-detect hybrid AF |
| Stabilisation | None (no IBIS) | None |
| Burst Rate | 6.5fps mechanical | 5fps |
| Battery Life | ~270 shots (CIPA) | ~370 shots (CIPA) |
| Weight | 356g (body, battery, card) | 474g (with battery and card) |
| Dimensions | 116.3 × 85.5 × 68.8mm | 126.9 × 94.4 × 48.2mm |
| Weather Sealed | No | Yes |
| Viewfinder | EVF, 2.36M dots, 0.59× magnification | Electronic, 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 (full-frame E-mount) |
| Memory Cards | Single SD UHS-II | Single SD / MemoryStick PRO Duo slot |
| Connectivity | USB-C, Wi-Fi, Bluetooth | Multi/Micro USB, Wi-Fi, NFC |
Suitability by genre
| Genre | EOS R100 | A7S |
|---|---|---|
| Portrait | ||
| Travel | ||
| Street | ||
| Video | — | |
| Wildlife | — | |
| Astrophotography | — | |
| Vlogging & Video | — | |
| Landscape | — | |
| Sports & Action | — |
GearScore™ suitability scores are based on aggregated purchaser reviews weighted by photography genre. See how scores are calculated →
More comparisons with EOS R100
Camera family history