GFX 100Svs Pentax K-3 Mark III
Fujifilm
GFX 100S (2021)
Starting from £3999 new
Best for Commercial, portrait & landscape photographers
View GFX 100S
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?
Commercial, Portrait & Landscape Photographers — GFX 100S (2021): 102MP medium-format with IBIS and phase-detect AF at a price that made serious large-format imaging available to a new generation of 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
GFX 100S (2021)
- Portrait and commercial photographers who need extraordinary resolution and rendering
- Landscape photographers who want the finest large-format detail in a manageable body
- GFX 50S II users who want to double their resolution with improved AF
- Studio photographers moving up from full-frame who want medium-format colour science
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 gfx 100s has the highest resolution at 102mp; the pentax k-3 mark iii is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | GFX 100S (2021) | Pentax K-3 Mark III (2021) |
|---|---|---|
| Price | £3,999 | £1,699 |
| Sensor | 102MP Medium Format BSI CMOS (43.8 × 32.9mm) | 25.7MP APS-C BSI CMOS (AA-filterless) |
| Resolution | 102.0MP | 25.7MP |
| Video | 4K/30p, FHD/120p | 4K/30p, 1080p/60p |
| Autofocus | Phase-detect hybrid AF, face/eye detection | SAFOX 13 phase-detect, 101-point (25 cross-type) |
| Stabilisation | IBIS — up to 6 stops | 5.5-stop 5-axis IBIS (Shake Reduction III) |
| Burst Rate | 5fps | 12fps |
| Battery Life | ~460 shots (CIPA) | 800 shots (CIPA) |
| Weight | 900g (with battery and card) | 820g body only |
| Dimensions | 150.0 × 104.2 × 87.2mm | 134.5 × 103.5 × 73.5mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF, 5.76M dots, 0.77× magnification | Optical pentaprism, 100% coverage, 1.05× magnification |
| Screen | 3.0" 3-direction tilting touchscreen | 3.2" tilting touchscreen |
| Mount | Fujifilm GFX (G-mount) | Pentax KF-mount |
| Memory Cards | Single CFexpress Type B / SD UHS-II combo slot | Dual SD UHS-II |
| Connectivity | USB-C, Wi-Fi, Bluetooth | USB-C, Wi-Fi, Bluetooth |
Suitability by genre
| Genre | GFX 100S | Pentax K-3 Mark III |
|---|---|---|
| Portrait | ||
| Landscape | ||
| Architecture | — | |
| Travel | ||
| Sports & Action | ||
| Vlogging & Video | ||
| Wildlife | — |
GearScore™ suitability scores are based on aggregated purchaser reviews weighted by photography genre. See how scores are calculated →
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Camera family history