OM-D E-M10 IVvs Pentax K-3 Mark III
Olympus
OM-D E-M10 IV (2020)
Starting from £699 new
Best for Travel & everyday
£699 at Wex Photo Video →
View OM-D E-M10 IV
Pentax
Pentax K-3 Mark III (2021)
Starting from £1699 new
Best for DSLR enthusiasts & outdoor photographers
Used from £856 at eBay →
View Pentax K-3 Mark III
Price buttons are affiliate links — GearFrame may earn a commission at no extra cost to you. It never affects our verdicts. Learn more
GearScore™ Verdict — Which should you buy?
Travel & Everyday — OM-D E-M10 IV (2020): Compact Micro Four Thirds body with built-in IBIS — ideal for travellers who want stability without bulk.
Dslr Enthusiasts & Outdoor Photographers — Pentax K-3 Mark III (2021): The finest APS-C DSLR ever made — class-leading weather sealing, optical viewfinder, 5-axis IBIS, and extraordinary build for photographers committed to DSLR.
Who should buy what
OM-D E-M10 IV (2020)
- Beginners and enthusiasts who want a compact, stylish Micro Four Thirds camera
- Travellers who want a small, light system without sacrificing image quality
- Smartphone upgraders who want a proper camera that still fits in a bag
- Anyone who wants built-in selfie capability in a traditional camera body
Pentax K-3 Mark III (2021)
- DSLR photographers who want the finest APS-C optical viewfinder experience
- Outdoor and weather photographers who need robust all-weather sealing
- Pentax lens owners who want to use their existing K-mount glass
- Photographers who prefer optical viewfinders and refuse to switch to mirrorless
Quick take: The pentax k-3 mark iii has the highest resolution at 26mp; the om-d e-m10 iv is the most affordable; only the pentax k-3 mark iii is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | OM-D E-M10 IV (2020) | Pentax K-3 Mark III (2021) |
|---|---|---|
| Price | £699 | £1,699 |
| Sensor | 20.3MP Micro Four Thirds Live MOS | 25.7MP APS-C BSI CMOS (AA-filterless) |
| Resolution | 20.3MP | 25.7MP |
| Video | 4K/30p, 1080p/60p | 4K/30p, 1080p/60p |
| Autofocus | Phase-detect + contrast detect, 121 points | SAFOX 13 phase-detect, 101-point (25 cross-type) |
| Stabilisation | 5-axis IBIS, 4.5 stops | 5.5-stop 5-axis IBIS (Shake Reduction III) |
| Burst Rate | 15fps | 12fps |
| Battery Life | ~360 shots (CIPA) | 800 shots (CIPA) |
| Weight | 383g body only | 820g body only |
| Dimensions | 121.4 × 83.6 × 49.0mm | 134.5 × 103.5 × 73.5mm |
| Weather Sealed | No | Yes |
| Viewfinder | EVF, 2.36M dots, 0.46× magnification | Optical pentaprism, 100% coverage, 1.05× magnification |
| Screen | 3.0" tilting touchscreen | 3.2" tilting touchscreen |
| Mount | Micro Four Thirds | Pentax KF-mount |
| Memory Cards | Single SD UHS-I slot | Dual SD UHS-II |
| Connectivity | USB Micro-B, Bluetooth, Wi-Fi, micro HDMI | USB-C, Wi-Fi, Bluetooth |
Suitability by genre
| Genre | OM-D E-M10 IV | Pentax K-3 Mark III |
|---|---|---|
| Travel | ||
| Street | — | |
| Family & Everyday | — | |
| Portrait | ||
| Landscape | ||
| Sports & Action | ||
| Wildlife | — | |
| Vlogging & Video | — |
GearScore™ suitability scores are based on aggregated purchaser reviews weighted by photography genre. See how scores are calculated →
More comparisons with OM-D E-M10 IV
Camera family history