Decision tools · Compare
EOS R100 vs OM-3
Quick take: The EOS R100 has the highest resolution at 24MP; the EOS R100 is the most affordable; only the OM-3 is weather sealed.
16 specs side by side·16 genres scored·UK prices from Wex Photo Video and Clifton Cameras
How to read this page. Highlighted cells win that row on the spec alone. Genre scores are the engine's base scores (enthusiast, photo and video); Camera Match re-weights them for your level and priorities. Price buttons are affiliate links; the price you pay is the same.
OM System
OM-3 2025
Best for Travel, outdoor & adventure photography
£1649
new today at Clifton Cameras
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Verdictwhich should you buy?
EOS R100 — First Camera / Beginner Photography: 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.
OM-3 — Travel, Outdoor & Adventure Photography: The ideal mid-range OM System camera — weather sealed, class-leading IBIS, and superb computational features in a compact body.
Who should buy what
EOS R100 (2023)
is the right camera for you if…
- 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
OM-3 (2025)
is the right camera for you if…
- Outdoor and adventure photographers who need weather sealing and compact size
- Wildlife and bird photographers wanting improved AF over the OM-5
- Travel shooters who want a rugged, lightweight MFT system
- OM-5 or E-M5 III owners wanting better autofocus without going to the OM-1
Full specificationsthe better value in each row is highlighted
| Specification | EOS R100Canon · 2023 | OM-3OM System · 2025 |
|---|---|---|
| Price | £559Best | £1,649 |
| Sensor | 24.1MP APS-C CMOS | 20.4MP Live MOS Micro Four Thirds |
| Resolution | 24.1MPBest | 20.4MP |
| Video | 4K/30p (slight crop), 1080p/60p | 4K/60p (10-bit), C4K/30p, 1080p/120p |
| Autofocus | Dual Pixel CMOS AF, face detection, subject tracking | Phase-detect AF — subject recognition (human, animal, bird, vehicle) |
| Stabilisation | No stabilisation | IBIS — up to 6.5 stops (7.5 stops with Sync IS lenses) |
| Burst Rate | 6.5fps mechanical | 10fps mechanical, 30fps electronic with AFBest |
| Battery Life | ~270 shots (CIPA) | ~400 shots (CIPA)Best |
| Weight | 356g (with battery and card)Best | 414g (with battery and card) |
| Dimensions | 116.3 × 85.5 × 68.8mm | 122.3 × 84.6 × 49.4mm |
| Weather Sealed | Not weather sealed | YesBest |
| Viewfinder | EVF, 2.36M dots, 0.59× magnification | EVF, 2.36M dots, 0.74× magnification |
| Screen | 3.0" fixed LCD, 1.04M dots (no touch) | 3.0" fully articulating touchscreen |
| Mount | Canon RF-mount | Micro Four Thirds |
| Memory Cards | Single SD UHS-II | Single SD UHS-II slot |
| Connectivity | USB-C, Wi-Fi, Bluetooth | USB-C, Wi-Fi, Bluetooth |
Wins the row — price, resolution, burst, battery, weight and sealing are compared; text specs aren't ranked.
How they score by genreengine base scores out of 10
Genre
EOS R100
OM-3
Portrait
6.2/10
7.3/10
Street
6.3/10
6.9/10
Travel
5.6/10
6.7/10
Wedding & Events
4.5/10
6.8/10
Filmmaking
4.5/10
6.7/10
Documentary
4.9/10
7.9/10
Sports & Action
5.6/10
8.9/10
Landscape
4.5/10
6.2/10
Wildlife
6.2/10
9.0/10
Casual
6.4/10
5.8/10
Food
5.1/10
7.3/10
Macro
4.4/10
8.2/10
Architecture
4.9/10
6.3/10
Astrophotography
4.2/10
6.1/10
Fun & simple
4.9/10
—
Vlogging & Video
—
6.5/10
Scores come from the same engine as Camera Match: verified specifications weighted by what each genre needs, with documented adjustments. The product page and this table show the enthusiast base score. See how scores are calculated →
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