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Quick take: The EOS M has the highest resolution at 18MP; the OM-D E-M5 is the most affordable; only the OM-D E-M5 is weather sealed.
16 specs side by side·13 genres scored·UK prices from Wex Photo Video and Clifton Cameras
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EOS M — Canon Mirrorless History & Ef-M Collectors: Canon's first mirrorless — a historic body that broke new ground with touch-AF and EF-M, but its sluggish contrast-detect system quickly became its Achilles heel.
| Specification | EOS MCanon · 2012 | OM-D E-M5Olympus · 2012 |
|---|---|---|
| Price | £40 used | £40 usedBest |
| Sensor | 18MP APS-C CMOS | 16.1MP Micro Four Thirds Live MOS |
| Resolution | 18.0MPBest | 16.1MP |
| Video | 1080p 30fps | Full HD 1080/60i |
| Autofocus | Hybrid CMOS AF (phase + contrast), notoriously slow | Contrast-detect AF, 35 areas, face and eye detection |
| Stabilisation | — | 5-axis in-body stabilisation |
| Burst Rate | 4fps | 9fpsBest |
| Battery Life | ~230 shots (CIPA) | ~360 shots (CIPA)Best |
| Weight | 262g (body only)Best | 425g (with battery) |
| Dimensions | 108.6 × 66.5 × 32.3mm | 121.9 × 88.9 × 43.2mm |
| Weather Sealed | Not weather sealed | YesBest |
| Viewfinder | No viewfinder | EVF, 1.44M dots |
| Screen | 3.0" fixed touchscreen, 1.04M dots | 3.0" tilting OLED touch screen, 610k dots |
| Mount | Canon EF-M mount | Micro Four Thirds |
| Memory Cards | 1× SD/SDHC/SDXC | Single SD slot |
| Connectivity | USB 2.0 | USB 2.0 multi-connector, micro HDMI, hot shoe, Accessory Port 2 |
Wins the row — price, resolution, burst, battery, weight and sealing are compared; text specs aren't ranked.
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 →