EOS R100vs Olympus OM-D E-M5 IIIvs A7C 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
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.
Full-Frame Hybrid — A7C II (2023): Full-frame AI autofocus in the most compact body available — the best camera under £1,500 for hybrid shooters.
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
A7C II (2023)
- You want full-frame image quality in the most compact body possible
- You travel constantly and need a serious camera that doesn't weigh down your bag
- You're a portrait or lifestyle photographer who shoots on the move
- You create content for social media or YouTube and want full-frame quality in a vlog-friendly form
Quick take: The a7c ii has the highest resolution at 33mp; 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) | A7C II (2023) |
|---|---|---|---|
| Price | £529 | £699 | £1,499 |
| Sensor | 24.1MP APS-C CMOS | 20.4MP Micro Four Thirds Live MOS | 33MP Full-frame Exmor R BSI CMOS |
| Resolution | 24.1MP | 20.4MP | 33.0MP |
| Video | 4K/30p (slight crop), 1080p/60p | 4K/30p, 1080p/120p | 4K/60p oversampled, S-Log3, 10-bit internal |
| Autofocus | Dual Pixel CMOS AF, face detection, subject tracking | Hybrid phase/contrast AF with face/eye detection | 759-point phase-detect, AI subject recognition |
| Stabilisation | None (no IBIS) | 7.5-stop 5-axis IBIS | 5-axis IBIS, 7.0 stops |
| Burst Rate | 6.5fps mechanical | 30fps electronic / 10fps mechanical | 10fps mechanical, 30fps electronic |
| Battery Life | ~270 shots (CIPA) | 390 shots (CIPA) | ~530 shots (CIPA) |
| Weight | 356g (body, battery, card) | 414g body only | 514g body only |
| Dimensions | 116.3 × 85.5 × 68.8mm | 125.3 × 85.2 × 49.7mm | 124.0 × 71.1 × 63.4mm |
| 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" vari-angle touchscreen |
| Mount | Canon RF-mount | Micro Four Thirds | Sony FE (full-frame E-mount) |
| Memory Cards | Single SD UHS-II | Single SD UHS-I | Dual slots: SD UHS-II + CFexpress Type A |
| Connectivity | USB-C, Wi-Fi, Bluetooth | Micro USB, Wi-Fi, Bluetooth | USB-C (3.2), Bluetooth, Wi-Fi |
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