OM-1vs A5100
GearScore™ Verdict — Which should you buy?
Wildlife, Sport, Outdoor — OM-1 (2022): OM System's statement camera — class-leading weather sealing and the best IBIS in the business.
Casual & Travel — A5100 (2014): The A5100 is one of the smallest APS-C mirrorless cameras ever made. Its 24MP sensor, phase-detect AF, and selfie-friendly flip screen pack remarkable capability into a shirt-pocket-sized body. No EVF or hot shoe limits it for serious use, but as a compact travel camera or beginner's first mirrorless, it punches well above its price on the used market.
Who should buy what
OM-1 (2022)
- Wildlife and bird photographers who need fast burst and pro weather sealing
- Outdoor photographers who work in challenging conditions
A5100 (2014)
- Beginners stepping up from a smartphone
- Compact travel photographers
- Casual vloggers who want APS-C quality
Quick take: The a5100 has the highest resolution at 24mp; the a5100 is the most affordable; only the om-1 is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | OM-1 (2022) | A5100 (2014) |
|---|---|---|
| Price | £1,299 | £200 |
| Sensor | Micro Four Thirds Live MOS stacked BSI | 24.3MP APS-C Exmor CMOS |
| Resolution | 20.4MP | 24.3MP |
| Video | 4K 60fps 10-bit | 1080p/60p |
| Autofocus | 1053-point cross-type phase-detect, AI subject recognition | Hybrid phase-detect / contrast-detect AF, face detection |
| Stabilisation | 5-axis IBIS, 7.0 stops (8 stops with sync IS) | None |
| Burst Rate | 10fps mechanical, 50fps electronic, 120fps Pro Capture | 6fps |
| Battery Life | 520 shots (CIPA) | ~400 shots (CIPA) |
| Weight | 599g (body only) | 224g (body only) |
| Dimensions | 134.8 × 91.6 × 72.7mm | 109.6 × 62.8 × 35.7mm |
| Weather Sealed | Yes | No |
| Viewfinder | EVF 0.83× 5.76M-dot | None |
| Screen | 3.0" fully articulating touchscreen, 1.62M-dot | 3.0" flip-up touchscreen, 921k dots |
| Mount | Micro Four Thirds | Sony E-mount |
| Memory Cards | 2× SD UHS-II / CFexpress Type B | Single SD / MemoryStick PRO Duo slot |
| Connectivity | Wi-Fi 5GHz, Bluetooth 5.0, USB-C 3.1, HDMI, 3.5mm mic/headphone | Micro USB, Wi-Fi, NFC |
Suitability by genre
| Genre | OM-1 | A5100 |
|---|---|---|
| Wildlife | — | |
| Sports & Action | ||
| Landscape | ||
| Travel | ||
| Portrait | ||
| Casual | ||
| Astrophotography | — | |
| Street | — | |
| Vlogging & Video | — |
GearScore™ suitability scores are based on aggregated purchaser reviews weighted by photography genre. See how scores are calculated →
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Camera family history