EOS-1D X Mark IIIvs EOS M100vs EOS R100
Canon
EOS-1D X Mark III (2020)
Starting from £3500 new
Best for Professional Sports, Wildlife & Press Photography
View EOS-1D X Mark III
Canon
EOS R100 (2023)
Starting from £529 new
Best for First camera / beginner photography
View EOS R100
GearScore™ Verdict — Which should you buy?
Professional Sports, Wildlife & Press Photography — EOS-1D X Mark III (2020): Canon's DSLR masterpiece — 20fps live view, 5.5K RAW, 191 cross-type AF points, and dual CFexpress. Almost certainly the finest optical viewfinder camera ever made.
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.
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.
Who should buy what
EOS-1D X Mark III (2020)
- Sports and wildlife photographers with a Canon EF lens collection
- Professionals who prefer the optical viewfinder experience
- Press photographers who need 20fps, weather sealing, and Ethernet
- Canon historians who want to mark the end of the EOS-1D DSLR era
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
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
Quick take: The eos m100 has the highest resolution at 24mp; the eos m100 is the most affordable; only the eos-1d x mark iii is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS-1D X Mark III (2020) | EOS M100 (2017) | EOS R100 (2023) |
|---|---|---|---|
| Price | £3,500 | £200 | £529 |
| Sensor | 20.1MP full-frame CMOS | 24.2MP APS-C CMOS (Dual Pixel) | 24.1MP APS-C CMOS |
| Resolution | 20.1MP | 24.2MP | 24.1MP |
| Video | 5.5K RAW, 4K 60fps (crop), 4K 60fps (full-frame via firmware) | 1080p/60p | 4K/30p (slight crop), 1080p/60p |
| Autofocus | 191-point all cross-type OVF AF; 525-point Dual Pixel CMOS AF (Live View) | Dual Pixel CMOS AF with face and subject detection | Dual Pixel CMOS AF, face detection, subject tracking |
| Stabilisation | — | — | None (no IBIS) |
| Burst Rate | 16fps mechanical, 20fps live view | 6.1fps | 6.5fps mechanical |
| Battery Life | ~2850 shots (CIPA) | ~295 shots (CIPA) | ~270 shots (CIPA) |
| Weight | 1250g (body only) | 302g (with battery and card) | 356g (body, battery, card) |
| Dimensions | 158 × 167.6 × 82.6mm | 108.2 × 67.1 × 35.1mm | 116.3 × 85.5 × 68.8mm |
| Weather Sealed | Yes | No | No |
| Viewfinder | OVF 0.76× magnification, 100% coverage | None | EVF, 2.36M dots, 0.59× magnification |
| Screen | 3.2" fully articulating touchscreen, 4.15M dots | 3.0" tilting touchscreen, 1.04M dots | 3.0" fixed touchscreen, 1.04M dots |
| Mount | Canon EF | Canon EF-M mount | Canon RF-mount |
| Memory Cards | Dual CFexpress Type B slots | Single SD UHS-I slot | Single SD UHS-II |
| Connectivity | Wi-Fi 5GHz, Bluetooth 4.2, USB-C 3.1 Gen 2, Ethernet | USB, Wi-Fi, Bluetooth, NFC | USB-C, Wi-Fi, Bluetooth |
Suitability by genre
| Genre | EOS-1D X Mark III | EOS M100 | EOS R100 |
|---|---|---|---|
| Sports & Action | — | ||
| Wildlife | — | ||
| Wedding & Events | — | — | |
| Portrait | |||
| Vlogging & Video | — | ||
| Street | |||
| Landscape | — | — | |
| Casual | — | — | |
| Travel | — | ||
| Video | — | — |
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