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
Quick take: The A1 has the highest resolution at 50MP; the BF is the most affordable.
16 specs side by side·15 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 2021
Best for Professional sport, wildlife, portrait & hybrid shooting
£4199
new today at Wex Photo Video
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 — Professional Sport, Wildlife, Portrait & Hybrid Shooting: 50MP, 30fps, 8K — the Sony A1 is the most complete professional camera ever made.
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 (2021)
is the right camera for you if…
- Professional photographers who need resolution and speed without compromise
- Sports and wildlife photographers demanding the absolute fastest Sony
- Studio and fashion photographers who also shoot sport or events
- A9 III or A7R V owners who want a single body that does everything
Full specificationsthe better value in each row is highlighted
| Specification | BFSigma · 2025 | A1Sony · 2021 |
|---|---|---|
| Price | £1,999Best | £4,199 |
| Sensor | 24MP full-frame BSI CMOS | 50.1MP Full-Frame Stacked BSI CMOS Exmor RS |
| Resolution | 24.0MP | 50.1MPBest |
| Video | 6K/30p, 4K/30p, 1080p/120p, L-Log | 8K/30p, 4K/120p, 1080p/240p |
| Autofocus | Phase-detect AF — face and eye detection | Real-time Tracking, AI subject recognition — 759 phase-detect points |
| Stabilisation | No IBIS (electronic IS for video) | IBIS — up to 5.5 stops |
| Burst Rate | 9fps electronic | 30fps electronic with full AF/AEBest |
| Battery Life | ~400 shots (CIPA) | ~430 shots (CIPA)Best |
| Weight | 427g (body only)Best | 737g (with battery and card) |
| Dimensions | 127.0 × 75.0 × 45.0mm | 128.9 × 96.9 × 80.8mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | None: rear screen only | EVF, 9.44M dots, 0.90× magnification, 240fps |
| Screen | 3.15" fixed touchscreen — primary interface | 3.0" fully tilting touchscreen |
| Mount | L-mount (Leica/Panasonic/Sigma) | Sony FE mount (full-frame E-mount) |
| Memory Cards | 230GB internal storage only — no card slot | Dual CFexpress Type A / SD UHS-II |
| Connectivity | USB-C, Wi-Fi, Bluetooth | USB-C, Wi-Fi 5GHz, Bluetooth, Ethernet, HDMI |
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
Portrait
6.4/10
8.2/10
Street
6.6/10
6.1/10
Travel
6.5/10
5.9/10
Wedding & Events
5.0/10
7.9/10
Filmmaking
5.9/10
7.8/10
Documentary
6.9/10
7.6/10
Sports & Action
5.8/10
8.8/10
Landscape
6.1/10
7.6/10
Wildlife
6.3/10
8.7/10
Casual
5.5/10
4.8/10
Food
6.0/10
7.4/10
Macro
4.9/10
7.3/10
Architecture
5.5/10
7.9/10
Astrophotography
6.4/10
6.8/10
Fun & simple
5.0/10
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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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