EOS M100vs A7S
GearScore™ Verdict — Which should you buy?
Casual & Everyday — EOS M100 (2017): The EOS M100 is Canon's most stripped-back EF-M camera — small, simple, and focused on making great photos easy. Dual Pixel AF, 24MP, and a tilting touchscreen are its strengths; no EVF, no IBIS, and no 4K are its compromises. A solid, affordable first mirrorless for casual photographers who want more than a smartphone.
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 M100 (2017)
- Smartphone users wanting their first interchangeable-lens camera
- Casual photographers who want APS-C quality in a slim, stylish body
- Anyone wanting a simple, affordable EF-M entry point
- Students and beginners learning photography
A7S (2014)
- Astrophotographers
- Low-light event videographers
- Filmmakers needing clean high-ISO footage
Quick take: The eos m100 has the highest resolution at 24mp; the eos m100 is the most affordable; only the a7s is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS M100 (2017) | A7S (2014) |
|---|---|---|
| Price | £200 | £600 |
| Sensor | 24.2MP APS-C CMOS (Dual Pixel) | 12.2MP Full-Frame BSI CMOS |
| Resolution | 24.2MP | 12.2MP |
| Video | 1080p/60p | 1080p/60p internal, 4K via HDMI (external recorder) |
| Autofocus | Dual Pixel CMOS AF with face and subject detection | Phase-detect / contrast-detect hybrid AF |
| Stabilisation | — | None |
| Burst Rate | 6.1fps | 5fps |
| Battery Life | ~295 shots (CIPA) | ~370 shots (CIPA) |
| Weight | 302g (with battery and card) | 474g (with battery and card) |
| Dimensions | 108.2 × 67.1 × 35.1mm | 126.9 × 94.4 × 48.2mm |
| Weather Sealed | No | Yes |
| Viewfinder | None | Electronic, 2.36M dots, 0.71× magnification |
| Screen | 3.0" tilting touchscreen, 1.04M dots | 3.0" tilting LCD, 1.23M dots |
| Mount | Canon EF-M mount | Sony FE (full-frame E-mount) |
| Memory Cards | Single SD UHS-I slot | Single SD / MemoryStick PRO Duo slot |
| Connectivity | USB, Wi-Fi, Bluetooth, NFC | Multi/Micro USB, Wi-Fi, NFC |
Suitability by genre
| Genre | EOS M100 | A7S |
|---|---|---|
| Casual | — | |
| Travel | ||
| Portrait | ||
| Vlogging & Video | ||
| Street | ||
| Sports & Action | ||
| Astrophotography | — | |
| Landscape | — |
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