GFX 100RFvs Pentax K-3 Mark III
Fujifilm
GFX 100RF (2025)
Starting from £5199 new
Best for Landscape, travel & street photography at medium format quality
View GFX 100RF
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?
Landscape, Travel & Street Photography At Medium Format Quality — GFX 100RF (2025): The world's first medium format compact — 102MP, 28mm, and all 20 Fujifilm film simulations in a fixed-lens body.
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 100RF (2025)
- Landscape photographers who want medium format resolution without a system of interchangeable lenses
- Leica Q3 owners who want a step up in resolution to 102MP medium format
- Fujifilm GFX users who want a compact fixed-lens body for travel alongside their system lenses
- Photographers who want the ultimate image quality in a jacket-pocketable form factor
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 100rf 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 100RF (2025) | Pentax K-3 Mark III (2021) |
|---|---|---|
| Price | £5,199 | £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 (crop), 4K/60p (crop) — F-Log2 | 4K/30p, 1080p/60p |
| Autofocus | Phase-detect AF with face and eye detection | SAFOX 13 phase-detect, 101-point (25 cross-type) |
| Stabilisation | 8-stop IBIS | 5.5-stop 5-axis IBIS (Shake Reduction III) |
| Burst Rate | 8fps electronic | 12fps |
| Battery Life | ~490 shots (CIPA) | 800 shots (CIPA) |
| Weight | 735g body only | 820g body only |
| Dimensions | 159.0 × 90.4 × 59.0mm | 134.5 × 103.5 × 73.5mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF 0.86× 5.76M-dot — outstanding GFX viewfinder | Optical pentaprism, 100% coverage, 1.05× magnification |
| Screen | 3.2" tilting touchscreen, 2.36M dots | 3.2" tilting touchscreen |
| Mount | Fixed GF 35mm f/4 (28mm equivalent in 35mm terms) | Pentax KF-mount |
| Memory Cards | Single CFexpress Type B / SD UHS-II slot | Dual SD UHS-II |
| Connectivity | USB-C, Wi-Fi 5GHz, Bluetooth, 3.5mm mic jack | USB-C, Wi-Fi, Bluetooth |
Suitability by genre
| Genre | GFX 100RF | Pentax K-3 Mark III |
|---|---|---|
| Landscape | ||
| Travel | ||
| Street | — | |
| Portrait | ||
| Sports | — | |
| Vlogging & Video | ||
| Wildlife | — | |
| Sports & Action | — |
GearScore™ suitability scores are based on aggregated purchaser reviews weighted by photography genre. See how scores are calculated →
More comparisons with GFX 100RF
Camera family history