BFvs Sigma fp
Sigma
BF (2025)
Starting from £1799 new
Best for Photographers who want to strip back every distraction
View BF
Sigma
Sigma fp (2019)
Starting from £1499 new
Best for Creative filmmakers & experimental photographers
View Sigma fp
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.
Creative Filmmakers & Experimental Photographers — Sigma fp (2019): The smallest full-frame camera in the world — Cinema DNG RAW and L-mount flexibility in a pocket-sized body that rewards creative shooters.
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
Sigma fp (2019)
- Filmmakers who want the world's smallest full-frame camera as a B or C camera
- Experimental photographers who want to build a unique, modular setup
- L-mount photographers who want an ultra-compact full-frame body
- Anyone who wants a conversation-starting camera that delivers serious results
Quick take: The sigma fp has the highest resolution at 25mp; the sigma fp is the most affordable; only the bf is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | BF (2025) | Sigma fp (2019) |
|---|---|---|
| Price | £1,799 | £1,499 |
| Sensor | 24MP full-frame BSI CMOS | 24.6MP full-frame Bayer CMOS |
| Resolution | 24.0MP | 24.6MP |
| Video | 4K/30p, 1080p/60p | 12-bit Cinema DNG RAW, 4K/24p, 1080p/120p |
| Autofocus | Phase-detect AF — face and eye detection | Contrast-detect AF with face/eye detection |
| Stabilisation | 5-axis IBIS — 7 stops | None (lens-based only) |
| Burst Rate | 9fps electronic | 18fps electronic |
| Battery Life | ~400 shots (CIPA) | 200 shots (CIPA) |
| Weight | 427g body only | 422g body only |
| Dimensions | 127.0 × 75.0 × 45.0mm | 112.6 × 69.9 × 45.3mm |
| Weather Sealed | Yes | No |
| Viewfinder | EVF 0.75× 3.68M-dot | None |
| Screen | 3.15" fully articulating touchscreen — primary interface | 3.15" fixed touchscreen |
| Mount | L-mount (Leica/Panasonic/Sigma) | Leica L-mount |
| Memory Cards | Single UHS-II SD slot | Single SD UHS-II + CFexpress Type B (via adapter) |
| Connectivity | USB-C, Wi-Fi, Bluetooth | USB-C 3.1, Wi-Fi, Bluetooth |
Suitability by genre
| Genre | BF | Sigma fp |
|---|---|---|
| Street | ||
| Travel | ||
| Portrait | ||
| Landscape | ||
| Sports | — | |
| Vlogging & Video | ||
| Sports & Action | — |
More comparisons with BF
Camera family history