OM-3vs Sigma fp
OM System
OM-3 (2024)
Starting from £999 new
Best for Travel, outdoor & adventure photography
View OM-3
Sigma
Sigma fp (2019)
Starting from £1499 new
Best for Creative filmmakers & experimental photographers
View Sigma fp
GearScore™ Verdict — Which should you buy?
Travel, Outdoor & Adventure Photography — OM-3 (2024): The ideal mid-range OM System camera — weather sealed, class-leading IBIS, and superb computational features in a compact body.
Creative Filmmakers & Experimental Photographers — Sigma fp (2019): The smallest full-frame camera in the world — Cinema DNG RAW and L-mount flexibility in a pocket-sized body that rewards creative shooters.
Who should buy what
OM-3 (2024)
- 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
Sigma fp (2019)
- Filmmakers who want the world's smallest full-frame camera as a B or C camera
- Experimental photographers who want to build a unique, modular setup
- L-mount photographers who want an ultra-compact full-frame body
- Anyone who wants a conversation-starting camera that delivers serious results
Quick take: The sigma fp has the highest resolution at 25mp; the om-3 is the most affordable; only the om-3 is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | OM-3 (2024) | Sigma fp (2019) |
|---|---|---|
| Price | £999 | £1,499 |
| Sensor | 20.4MP Live MOS Micro Four Thirds | 24.6MP full-frame Bayer CMOS |
| Resolution | 20.4MP | 24.6MP |
| Video | 4K/60p (10-bit), C4K/30p, 1080p/120p | 12-bit Cinema DNG RAW, 4K/24p, 1080p/120p |
| Autofocus | Phase-detect AF — subject recognition (human, animal, bird, vehicle) | Contrast-detect AF with face/eye detection |
| Stabilisation | IBIS — up to 6.5 stops (7.5 stops with Sync IS lenses) | None (lens-based only) |
| Burst Rate | 10fps mechanical, 30fps electronic with AF | 18fps electronic |
| Battery Life | ~400 shots (CIPA) | 200 shots (CIPA) |
| Weight | 414g (with battery) | 422g body only |
| Dimensions | 122.3 × 84.6 × 49.4mm | 112.6 × 69.9 × 45.3mm |
| Weather Sealed | Yes | No |
| Viewfinder | EVF, 2.36M dots, 0.74× magnification | None |
| Screen | 3.0" fully articulating touchscreen | 3.15" fixed touchscreen |
| Mount | Micro Four Thirds | Leica L-mount |
| Memory Cards | Single SD UHS-II slot | Single SD UHS-II + CFexpress Type B (via adapter) |
| Connectivity | USB-C, Wi-Fi, Bluetooth | USB-C 3.1, Wi-Fi, Bluetooth |
Suitability by genre
| Genre | OM-3 | Sigma fp |
|---|---|---|
| Travel | ||
| Wildlife | — | |
| Landscape | ||
| Street | ||
| Portrait | ||
| Vlogging & Video | ||
| Sports & Action | — |
More comparisons with OM-3
Camera family history