Pentax K-3 Mark IIIvs BF
Pentax
Pentax K-3 Mark III (2021)
Starting from £1699 new
Best for DSLR enthusiasts & outdoor photographers
View Pentax K-3 Mark III
Sigma
BF (2025)
Starting from £1799 new
Best for Photographers who want to strip back every distraction
View BF
GearScore™ Verdict — Which should you buy?
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.
Photographers Who Want To Strip Back Every Distraction — BF (2025): The most radical camera in years — no dials, no buttons, just a flat aluminium body and total creative minimalism.
Who should buy what
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
BF (2025)
- Photographers who find camera menus and dials a distraction from the creative process
- L-mount system users who want the lightest, most minimal full-frame body available
- Design enthusiasts who value the object quality and philosophy as much as the output
- Sigma fp/fp L users ready for a more radical step toward minimal photography
Quick take: The pentax k-3 mark iii has the highest resolution at 26mp; the pentax k-3 mark iii is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | Pentax K-3 Mark III (2021) | BF (2025) |
|---|---|---|
| Price | £1,699 | £1,799 |
| Sensor | 25.7MP APS-C BSI CMOS (AA-filterless) | 24MP full-frame BSI CMOS |
| Resolution | 25.7MP | 24.0MP |
| Video | 4K/30p, 1080p/60p | 4K/30p, 1080p/60p |
| Autofocus | SAFOX 13 phase-detect, 101-point (25 cross-type) | Phase-detect AF — face and eye detection |
| Stabilisation | 5.5-stop 5-axis IBIS (Shake Reduction III) | 5-axis IBIS — 7 stops |
| Burst Rate | 12fps | 9fps electronic |
| Battery Life | 800 shots (CIPA) | ~400 shots (CIPA) |
| Weight | 820g body only | 427g body only |
| Dimensions | 134.5 × 103.5 × 73.5mm | 127.0 × 75.0 × 45.0mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | Optical pentaprism, 100% coverage, 1.05× magnification | EVF 0.75× 3.68M-dot |
| Screen | 3.2" tilting touchscreen | 3.15" fully articulating touchscreen — primary interface |
| Mount | Pentax KF-mount | L-mount (Leica/Panasonic/Sigma) |
| Memory Cards | Dual SD UHS-II | Single UHS-II SD slot |
| Connectivity | USB-C, Wi-Fi, Bluetooth | USB-C, Wi-Fi, Bluetooth |
Suitability by genre
| Genre | Pentax K-3 Mark III | BF |
|---|---|---|
| Landscape | ||
| Wildlife | — | |
| Sports & Action | — | |
| Portrait | ||
| Travel | ||
| Vlogging & Video | ||
| Street | — | |
| Sports | — |
GearScore™ suitability scores are based on aggregated purchaser reviews weighted by photography genre. See how scores are calculated →
More comparisons with Pentax K-3 Mark III