EOS R100vs Olympus OM-D E-M5 IIIvs A6400
OM System
Olympus OM-D E-M5 III (2019)
From £699
Best for Travel & lightweight outdoor photography
View Olympus OM-D E-M5 III
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.
Travel & Lightweight Outdoor Photography — Olympus OM-D E-M5 III (2019): The lightest weather-sealed MFT camera — compact, travel-friendly, and capable with 7.5-stop IBIS in a body that fits in a jacket pocket.
Content Creation & Vlogging — A6400 (2019): The best value APS-C Sony you can buy — especially used. Real-time Eye AF at this price point was transformative when it launched and still makes it one of the most reliable autofocus systems in the lineup.
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
Olympus OM-D E-M5 III (2019)
- You want a lightweight, sealed camera for travel and outdoor photography
- You're new to Micro Four Thirds and want a capable mid-range body with excellent stabilisation
- Note: consider the newer OM-5 for updated specs in a similar compact form factor
A6400 (2019)
- Vloggers and content creators who need a flip screen and reliable AF
- Photographers upgrading from a compact or smartphone
- Beginners who want room to grow into a full E-mount lens ecosystem
- Anyone prioritising autofocus performance at an accessible price
Quick take: The a6400 has the highest resolution at 24mp; the eos r100 is the most affordable; only the olympus om-d e-m5 iii is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS R100 (2023) | Olympus OM-D E-M5 III (2019) | A6400 (2019) |
|---|---|---|---|
| Price | £529 | £699 | £899 |
| Sensor | 24.1MP APS-C CMOS | 20.4MP Micro Four Thirds Live MOS | 24.2MP APS-C Exmor CMOS BSI |
| Resolution | 24.1MP | 20.4MP | 24.2MP |
| Video | 4K/30p (slight crop), 1080p/60p | 4K/30p, 1080p/120p | 4K/30p (6K oversampled, no crop), 1080p/120p slow-motion |
| Autofocus | Dual Pixel CMOS AF, face detection, subject tracking | Hybrid phase/contrast AF with face/eye detection | Phase-detect, 425 points, real-time Eye AF & animal AF |
| Stabilisation | None (no IBIS) | 7.5-stop 5-axis IBIS | None (no IBIS) |
| Burst Rate | 6.5fps mechanical | 30fps electronic / 10fps mechanical | 11fps mechanical, 8fps with AF tracking |
| Battery Life | ~270 shots (CIPA) | 390 shots (CIPA) | ~410 shots (CIPA) |
| Weight | 356g (body, battery, card) | 414g body only | 403g (body, battery, card) |
| Dimensions | 116.3 × 85.5 × 68.8mm | 125.3 × 85.2 × 49.7mm | 120.0 × 66.9 × 59.7mm |
| Weather Sealed | No | Yes | No |
| Viewfinder | EVF, 2.36M dots, 0.59× magnification | 0.35" OLED EVF, 2.36M dots | EVF, 2.36M dots, 0.70× magnification |
| Screen | 3.0" fixed touchscreen, 1.04M dots | 3.0" fully articulating touchscreen | 3.0" tilting touchscreen, 180° flip for selfie/vlog, 921k dots |
| Mount | Canon RF-mount | Micro Four Thirds | Sony E-mount |
| Memory Cards | Single SD UHS-II | Single SD UHS-I | Single SD UHS-I |
| Connectivity | USB-C, Wi-Fi, Bluetooth | Micro USB, Wi-Fi, Bluetooth | Micro-USB, Wi-Fi, Bluetooth, NFC |
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