BFvs FX3
Sigma
BF (2025)
Starting from £1799 new
Best for Photographers who want to strip back every distraction
View BF
Sony
FX3 (2021)
Starting from £3799 new
Best for Professional video, documentary & cinematic filmmaking
View FX3
GearScore™ Verdict — Which should you buy?
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.
Professional Video, Documentary & Cinematic Filmmaking — FX3 (2021): The definitive run-and-gun cinema camera — A7S III sensor quality in a body built specifically for video professionals.
Who should buy what
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
FX3 (2021)
- Professional videographers and filmmakers who need cinema-quality colour science in a compact body
- Documentary and run-and-gun shooters who need 4K/120p and built-in XLR audio
- Sony A7S III owners who want a purpose-built video body alongside their stills camera
- Gimbal and drone operators who need a compact full-frame cinema camera
Quick take: The bf has the highest resolution at 24mp; the bf is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | BF (2025) | FX3 (2021) |
|---|---|---|
| Price | £1,799 | £3,799 |
| Sensor | 24MP full-frame BSI CMOS | 12.1MP full-frame BSI Exmor R CMOS (same as A7S III) |
| Resolution | 24.0MP | 12.1MP |
| Video | 4K/30p, 1080p/60p | 4K/120p, 4K/60p 10-bit, 12-bit RAW output, S-Log3, S-Cinetone |
| Autofocus | Phase-detect AF — face and eye detection | Real-time tracking with subject recognition (human, animal) |
| Stabilisation | 5-axis IBIS — 7 stops | 5-axis IBIS — 5 stops |
| Burst Rate | 9fps electronic | 10fps mechanical, 10fps electronic |
| Battery Life | ~400 shots (CIPA) | ~640 shots (CIPA) |
| Weight | 427g body only | 715g body only (with XLR handle) |
| Dimensions | 127.0 × 75.0 × 45.0mm | 129.7 × 78.0 × 84.5mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF 0.75× 3.68M-dot | None — monitor/external EVF use only |
| Screen | 3.15" fully articulating touchscreen — primary interface | 3.0" touchscreen, fully articulating |
| Mount | L-mount (Leica/Panasonic/Sigma) | Sony FE mount (full-frame E-mount) |
| Memory Cards | Single UHS-II SD slot | Dual CFexpress Type A / SD UHS-II slots |
| Connectivity | USB-C, Wi-Fi, Bluetooth | USB-C (10Gbps), full-size HDMI, XLR via handle, Bluetooth, Wi-Fi |
Suitability by genre
| Genre | BF | FX3 |
|---|---|---|
| Street | ||
| Travel | ||
| Portrait | ||
| Landscape | — | |
| Sports | — | |
| Vlogging & Video | ||
| Low Light | — | |
| Wedding | — |
GearScore™ suitability scores are based on aggregated purchaser reviews weighted by photography genre. See how scores are calculated →
More comparisons with BF
Camera family history