OM System
OM-3 2025
Best for Travel, outdoor & adventure photography
£1599
new today at Clifton Cameras
Decision tools · Compare
OM-3 vs A6100
Quick take: The A6100 has the highest resolution at 24MP; the A6100 is the most affordable; only the OM-3 is weather sealed.
16 specs side by side·15 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.
Price buttons are affiliate links — GearFrame may earn a commission at no extra cost to you. It never affects a score. Learn more
Verdictwhich should you buy?
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.
A6100 — Beginner, Family, Travel: Best autofocus in its class for the price.
Who should buy what
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
A6100 (2019)
is the right camera for you if…
- First-time mirrorless buyers who want solid AF
- Families stepping up from a smartphone
Full specificationsthe better value in each row is highlighted
| Specification | OM-3OM System · 2025 | A6100Sony · 2019 |
|---|---|---|
| Price | £1,599 | £649Best |
| Sensor | 20.4MP Live MOS Micro Four Thirds | APS-C Exmor CMOS |
| Resolution | 20.4MP | 24.2MPBest |
| Video | 4K/60p (10-bit), C4K/30p, 1080p/120p | 4K 30fps |
| Autofocus | Phase-detect AF — subject recognition (human, animal, bird, vehicle) | 425-point phase-detect, real-time tracking |
| Stabilisation | IBIS — up to 6.5 stops (7.5 stops with Sync IS lenses) | No stabilisation |
| Burst Rate | 10fps mechanical, 30fps electronic with AF | 11fpsBest |
| Battery Life | ~400 shots (CIPA) | 420 shots (CIPA)Best |
| Weight | 414g (with battery and card) | 396g (body only)Best |
| Dimensions | 122.3 × 84.6 × 49.4mm | 119.9 × 66.9 × 59.4mm |
| Weather Sealed | YesBest | Not weather sealed |
| Viewfinder | EVF, 2.36M dots, 0.74× magnification | EVF 0.39" 1.44M-dot |
| Screen | 3.0" fully articulating touchscreen | 3.0" tilting touchscreen, 921k-dot |
| Mount | Micro Four Thirds | Sony E-Mount |
| Memory Cards | Single SD UHS-II slot | SD UHS-I / Memory Stick |
| Connectivity | USB-C, Wi-Fi, Bluetooth | Wi-Fi, Bluetooth 4.1, Micro USB, Micro HDMI |
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
OM-3
A6100
Portrait
7.3/10
6.7/10
Street
6.9/10
7.3/10
Travel
6.7/10
6.2/10
Wedding & Events
6.8/10
5.1/10
Vlogging & Video
6.5/10
5.9/10
Filmmaking
6.7/10
4.9/10
Documentary
7.9/10
5.2/10
Sports & Action
8.9/10
6.5/10
Landscape
6.2/10
4.9/10
Wildlife
9.0/10
6.9/10
Casual
5.8/10
6.4/10
Food
7.3/10
6.2/10
Macro
8.2/10
5.2/10
Architecture
6.3/10
5.5/10
Astrophotography
6.1/10
6.0/10
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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