Sigma
BF 2025
Best for Photographers who want to strip back every distraction
£1999
new today at Wex Photo Video
Decision tools · Compare
BF vs A1 II
Quick take: The A1 II has the highest resolution at 50MP; the BF is the most affordable.
16 specs side by side·16 genres scored·UK prices from Wex Photo Video and Clifton Cameras
How to read this page. Highlighted cells win that row on the spec alone. Genre scores are the engine's base scores (enthusiast, photo and video); Camera Match re-weights them for your level and priorities. Price buttons are affiliate links; the price you pay is the same.
Sony
A1 II 2024
Best for Professional sports, wildlife & high-resolution studio work
£5699
new today at Clifton Cameras
Price buttons are affiliate links — GearFrame may earn a commission at no extra cost to you. It never affects a score. Learn more
Verdictwhich should you buy?
BF — Photographers Who Want To Strip Back Every Distraction: The most radical camera in years — no dials, no buttons, just a flat aluminium body and total creative minimalism.
A1 II — Professional Sports, Wildlife & High-Resolution Studio Work: The most complete camera ever made — 50MP, 30fps, 8K, and the world's best EVF in a single flagship body.
Who should buy what
BF (2025)
is the right camera for you if…
- 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
A1 II (2024)
is the right camera for you if…
- Professional sports and wildlife photographers who need 30fps, 50MP, and the best AF available
- Commercial and advertising photographers who demand 50MP resolution alongside pro video specs
- Photojournalists who need a single body capable of handling every assignment
- Sony system shooters ready to invest in the absolute best
Full specificationsthe better value in each row is highlighted
| Specification | BFSigma · 2025 | A1 IISony · 2024 |
|---|---|---|
| Price | £1,999Best | £5,699 |
| Sensor | 24MP full-frame BSI CMOS | 50.1MP full-frame stacked BSI CMOS |
| Resolution | 24.0MP | 50.1MPBest |
| Video | 6K/30p, 4K/30p, 1080p/120p, L-Log | 8K/30p, 4K/120p 10-bit, S-Log3 |
| Autofocus | Phase-detect AF — face and eye detection | AI subject recognition — human, animal, bird, insect, vehicle, aircraft, train |
| Stabilisation | No IBIS (electronic IS for video) | 8.5-stop IBIS (with in-lens OSS) |
| Burst Rate | 9fps electronic | 30fps electronic (with full AF/AE), 10fps mechanicalBest |
| Battery Life | ~400 shots (CIPA) | ~530 shots (CIPA)Best |
| Weight | 427g (body only)Best | 743g (body only) |
| Dimensions | 127.0 × 75.0 × 45.0mm | 136.1 × 96.9 × 82.9mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | None: rear screen only | EVF 0.9× 9.44M-dot — the highest resolution EVF available |
| Screen | 3.15" fixed touchscreen — primary interface | 3.2" fully articulating touchscreen, 2.1M dots |
| Mount | L-mount (Leica/Panasonic/Sigma) | Sony E-mount (full-frame) |
| Memory Cards | 230GB internal storage only — no card slot | Dual CFexpress Type A / SD UHS-II slots |
| Connectivity | USB-C, Wi-Fi, Bluetooth | USB-C 3.2 Gen 2, Wi-Fi 6GHz, Bluetooth 5.3, HDMI full-size |
Wins the row — price, resolution, burst, battery, weight and sealing are compared; text specs aren't ranked.
How they score by genreengine base scores out of 10
Genre
BF
A1 II
Portrait
6.4/10
9.0/10
Street
6.6/10
6.6/10
Travel
6.5/10
6.4/10
Wedding & Events
5.0/10
8.7/10
Filmmaking
5.9/10
8.2/10
Documentary
6.9/10
8.3/10
Sports & Action
5.8/10
9.3/10
Landscape
6.1/10
8.0/10
Wildlife
6.3/10
9.2/10
Casual
5.5/10
5.3/10
Food
6.0/10
8.5/10
Macro
4.9/10
8.1/10
Architecture
5.5/10
8.4/10
Astrophotography
6.4/10
7.2/10
Fun & simple
5.0/10
—
Vlogging & Video
—
6.4/10
Scores come from the same engine as Camera Match: verified specifications weighted by what each genre needs, with documented adjustments. The product page and this table show the enthusiast base score. See how scores are calculated →
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