EOS R100vs X-E4vs Olympus OM-D E-M5 III
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.
Compact Street & Travel Photography — X-E4 (2021): The X-E4 is for photographers who want the minimum camera that still delivers maximum image quality. If you love shooting from the rear screen and want the smallest possible X-mount body, this is your camera. If you need a viewfinder or IBIS, look at the X-S20 or X-T30 II.
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.
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
X-E4 (2021)
- Street photographers who prioritise portability and discretion
- Travel photographers packing minimally
- Fujifilm fans who shoot primarily from the rear screen
- Anyone who wants the X-Trans sensor in the smallest possible body
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
Quick take: The x-e4 has the highest resolution at 26mp; 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) | X-E4 (2021) | Olympus OM-D E-M5 III (2019) |
|---|---|---|---|
| Price | £529 | £699 | £699 |
| Sensor | 24.1MP APS-C CMOS | 26.1MP APS-C X-Trans CMOS IV | 20.4MP Micro Four Thirds Live MOS |
| Resolution | 24.1MP | 26.1MP | 20.4MP |
| Video | 4K/30p (slight crop), 1080p/60p | 4K/30p, 1080p/240p slow-motion, F-Log | 4K/30p, 1080p/120p |
| Autofocus | Dual Pixel CMOS AF, face detection, subject tracking | Phase-detect, 425 points, face/Eye detection | Hybrid phase/contrast AF with face/eye detection |
| Stabilisation | None (no IBIS) | None (no IBIS) | 7.5-stop 5-axis IBIS |
| Burst Rate | 6.5fps mechanical | 8fps mechanical, 20fps electronic | 30fps electronic / 10fps mechanical |
| Battery Life | ~270 shots (CIPA) | ~460 shots (CIPA) | 390 shots (CIPA) |
| Weight | 356g (body, battery, card) | 364g (body only) | 414g body only |
| Dimensions | 116.3 × 85.5 × 68.8mm | 121.3 × 72.9 × 32.7mm | 125.3 × 85.2 × 49.7mm |
| Weather Sealed | No | No | Yes |
| Viewfinder | EVF, 2.36M dots, 0.59× magnification | None — rear screen only (EVF accessory available) | 0.35" OLED EVF, 2.36M dots |
| Screen | 3.0" fixed touchscreen, 1.04M dots | 3.0" fixed touchscreen, 1.62M dots | 3.0" fully articulating touchscreen |
| Mount | Canon RF-mount | Fujifilm X-mount | Micro Four Thirds |
| Memory Cards | Single SD UHS-II | Single SD UHS-I | Single SD UHS-I |
| Connectivity | USB-C, Wi-Fi, Bluetooth | USB-C, Bluetooth, Wi-Fi | Micro USB, Wi-Fi, Bluetooth |
Compare pairs from this group