EOS R100vs Olympus OM-D E-M5 IIIvs OM System OM-1 Mark II
OM System
Olympus OM-D E-M5 III (2019)
From £699
Best for Travel & lightweight outdoor photography
View Olympus OM-D E-M5 III
OM System
OM System OM-1 Mark II (2024)
From £1999
Best for Wildlife, birds & outdoor sports
View OM System OM-1 Mark II
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.
Wildlife, Birds & Outdoor Sports — OM System OM-1 Mark II (2024): OM System's most capable camera — 120fps AF burst, AI subject detection, and IP53 weather sealing make it the best-value pro wildlife camera.
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
OM System OM-1 Mark II (2024)
- You shoot wildlife, birds in flight, or fast-moving action where tracking accuracy is critical
- You need extreme weather sealing for shooting in rain, dust, mud, or freezing cold
- You're invested in the MFT ecosystem and want the absolute best body available
Quick take: The eos r100 has the highest resolution at 24mp; the eos r100 is the most affordable; only the olympus om-d e-m5 iii, om system om-1 mark ii are weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS R100 (2023) | Olympus OM-D E-M5 III (2019) | OM System OM-1 Mark II (2024) |
|---|---|---|---|
| Price | £529 | £699 | £1,999 |
| Sensor | 24.1MP APS-C CMOS | 20.4MP Micro Four Thirds Live MOS | 20MP Micro Four Thirds Live MOS |
| Resolution | 24.1MP | 20.4MP | 20.0MP |
| Video | 4K/30p (slight crop), 1080p/60p | 4K/30p, 1080p/120p | 4K/60p, 1080p/240p, 4K HLG |
| Autofocus | Dual Pixel CMOS AF, face detection, subject tracking | Hybrid phase/contrast AF with face/eye detection | AI subject detection AF (birds, animals, motorsport) |
| Stabilisation | None (no IBIS) | 7.5-stop 5-axis IBIS | 8.5-stop IBIS |
| Burst Rate | 6.5fps mechanical | 30fps electronic / 10fps mechanical | 120fps with AF tracking |
| Battery Life | ~270 shots (CIPA) | 390 shots (CIPA) | 520 shots (CIPA) |
| Weight | 356g (body, battery, card) | 414g body only | 599g body only |
| Dimensions | 116.3 × 85.5 × 68.8mm | 125.3 × 85.2 × 49.7mm | 134.8 × 91.6 × 72.7mm |
| Weather Sealed | No | Yes | Yes |
| Viewfinder | EVF, 2.36M dots, 0.59× magnification | 0.35" OLED EVF, 2.36M dots | 0.83" OLED EVF, 5.76M dots, 120fps |
| Screen | 3.0" fixed touchscreen, 1.04M dots | 3.0" fully articulating touchscreen | 3.0" fully articulating touchscreen |
| Mount | Canon RF-mount | Micro Four Thirds | Micro Four Thirds |
| Memory Cards | Single SD UHS-II | Single SD UHS-I | Dual SD UHS-II |
| Connectivity | USB-C, Wi-Fi, Bluetooth | Micro USB, Wi-Fi, Bluetooth | USB-C, Wi-Fi, Bluetooth |
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