OM-1vs Pentax K-3 Mark III
VS
Pentax
Pentax K-3 Mark III (2021)
Starting from £1699 new
Best for DSLR enthusiasts & outdoor photographers
View Pentax K-3 Mark III
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.
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-1 (2022)
- Wildlife and bird photographers who need fast burst and pro weather sealing
- Outdoor photographers who work in challenging conditions
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-1 is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | OM-1 (2022) | Pentax K-3 Mark III (2021) |
|---|---|---|
| Price | £1,299 | £1,699 |
| Sensor | Micro Four Thirds Live MOS stacked BSI | 25.7MP APS-C BSI CMOS (AA-filterless) |
| Resolution | 20.4MP | 25.7MP |
| Video | 4K 60fps 10-bit | 4K/30p, 1080p/60p |
| Autofocus | 1053-point cross-type phase-detect, AI subject recognition | SAFOX 13 phase-detect, 101-point (25 cross-type) |
| Stabilisation | 5-axis IBIS, 7.0 stops (8 stops with sync IS) | 5.5-stop 5-axis IBIS (Shake Reduction III) |
| Burst Rate | 10fps mechanical, 50fps electronic, 120fps Pro Capture | 12fps |
| Battery Life | 520 shots (CIPA) | 800 shots (CIPA) |
| Weight | 599g (body only) | 820g body only |
| Dimensions | 134.8 × 91.6 × 72.7mm | 134.5 × 103.5 × 73.5mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF 0.83× 5.76M-dot | Optical pentaprism, 100% coverage, 1.05× magnification |
| Screen | 3.0" fully articulating touchscreen, 1.62M-dot | 3.2" tilting touchscreen |
| Mount | Micro Four Thirds | Pentax KF-mount |
| Memory Cards | 2× SD UHS-II / CFexpress Type B | Dual SD UHS-II |
| Connectivity | Wi-Fi 5GHz, Bluetooth 5.0, USB-C 3.1, HDMI, 3.5mm mic/headphone | USB-C, Wi-Fi, Bluetooth |
Suitability by genre
| Genre | OM-1 | Pentax K-3 Mark III |
|---|---|---|
| Landscape | — | |
| Wildlife | — | |
| Sports & Action | — | |
| Portrait | — | |
| Travel | — | |
| Vlogging & Video | — |
More comparisons with OM-1
Camera family history