Fujifilm GFX 100S IIvs OM-5vs Pentax K-3 Mark III
Fujifilm
Fujifilm GFX 100S II (2024)
From £4499
Best for Commercial, studio & landscape professionals
View Fujifilm GFX 100S II
Pentax
Pentax K-3 Mark III (2021)
From £1699
Best for DSLR enthusiasts & outdoor photographers
View Pentax K-3 Mark III
Which should you buy?
Commercial, Studio & Landscape Professionals — Fujifilm GFX 100S II (2024): 102MP medium-format quality in the most accessible GFX body — the best entry point to the Fujifilm GFX system.
Outdoor & Adventure — OM-5 (2022): The toughest camera at this price — IP53 weather sealing and 7.5-stop IBIS built for adventure photographers.
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
Fujifilm GFX 100S II (2024)
- You need the highest resolution available outside of a Phase One system
- You shoot studio, fashion, landscape, or architecture at a professional level
- You want medium format quality without the bulk of a traditional large-format system
OM-5 (2022)
- You need weather sealing and in-body stabilisation in a compact, lightweight body
- You hike, travel, or shoot outdoors and want serious protection without the weight penalty
- You're in the MFT ecosystem and want a step up in capability from entry-level bodies
Pentax K-3 Mark III (2021)
- You're a committed DSLR photographer with significant investment in Pentax glass
- You shoot in extreme weather conditions and place build quality and reliability above everything
- You prefer optical viewfinder performance and want the best modern APS-C DSLR available
Quick take: The fujifilm gfx 100s ii has the highest resolution at 102mp; the om-5 is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | Fujifilm GFX 100S II (2024) | OM-5 (2022) | Pentax K-3 Mark III (2021) |
|---|---|---|---|
| Price | £4,499 | £899 | £1,699 |
| Sensor | 102MP medium-format BSI CMOS (43.8 × 32.9mm) | 20.4MP Micro Four Thirds Live MOS | 25.7MP APS-C BSI CMOS (AA-filterless) |
| Resolution | 102.0MP | 20.4MP | 25.7MP |
| Video | 4K/30p, 1080p/60p | 4K/60p, 4K/120p Cinema4K | 4K/30p, 1080p/60p |
| Autofocus | Phase-detect AF with subject/face/eye detection | Phase-detect, 121 all-cross points, subject tracking | SAFOX 13 phase-detect, 101-point (25 cross-type) |
| Stabilisation | 8-stop IBIS | 5-axis IBIS, 7.5 stops (Dual IS with compatible lenses) | 5.5-stop 5-axis IBIS (Shake Reduction III) |
| Burst Rate | 7fps | 30fps electronic, 10fps mechanical | 12fps |
| Battery Life | 460 shots (CIPA) | ~370 shots (CIPA) | 800 shots (CIPA) |
| Weight | 883g body only | 414g body only | 820g body only |
| Dimensions | 150.0 × 104.2 × 87.2mm | 122.3 × 87.6 × 49.7mm | 134.5 × 103.5 × 73.5mm |
| Weather Sealed | Yes | Yes | Yes |
| Viewfinder | 0.5" OLED EVF, 5.76M dots | EVF, 2.36M dots, 0.74× magnification | Optical pentaprism, 100% coverage, 1.05× magnification |
| Screen | 3.2" tilting touchscreen | 3.0" fully articulating touchscreen | 3.2" tilting touchscreen |
| Mount | Fujifilm GFX (G-mount) | Micro Four Thirds | Pentax KF-mount |
| Memory Cards | Dual SD UHS-II | Dual SD UHS-II slots | Dual SD UHS-II |
| Connectivity | USB-C 3.2, Wi-Fi, Bluetooth | USB-C, Bluetooth, Wi-Fi | USB-C, Wi-Fi, Bluetooth |
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