Upgrade Guide
Sigma fp→Sigma BF
Is it worth upgrading? Spec analysis, key improvements, and our verdict.
→
Strong upgrade
The BF improves across 3 key areas at a reasonable price gap. Most fp owners will notice the difference.
What's new in the BF
-
StabilisationIBIS added — significant for handheld and video
-
Battery life~400 shots (CIPA) vs 200 shots (CIPA)
-
Generation6 years newer (2025 vs 2019)
Unchanged or similar
-
ResolutionSimilar (24MP)
Suitability by genre
Base scores — computed from verified specs for an enthusiast shooting photo and video. The Upgrade Checker adjusts them for your skill level.
| Genre | fp | BF | |
|---|---|---|---|
| Portrait | +1.2 | ||
| Street | +0.3 | ||
| Travel | +0.5 | ||
| Wedding & Events | +1.2 | ||
| Filmmaking | +0.8 | ||
| Documentary | +1.4 | ||
| Sports & Action | +0.4 | ||
| Landscape | +0.4 | ||
| Wildlife | +0.6 | ||
| Casual | +0.8 | ||
| Food | +0.9 | ||
| Macro | +0.5 | ||
| Architecture | +0.2 | ||
| Astrophotography | +0.5 | ||
| Fun & simple | — |
Full spec comparison
| Spec | fp | BF | |
|---|---|---|---|
| Price | £1,599 | £1,999 | |
| Released | 2019 | 2025 | ↑ |
| Sensor | 24.6MP full-frame Bayer CMOS | 24MP full-frame BSI CMOS | |
| Resolution | 25MP | 24MP | ↓ |
| Video | 12-bit CinemaDNG RAW, 4K/30p, 1080p/120p | 6K/30p, 4K/30p, 1080p/120p, L-Log | |
| Autofocus | Contrast-detect AF with face/eye detection | Phase-detect AF — face and eye detection | |
| Stabilisation | None (lens-based only) | No IBIS (electronic IS for video) | |
| Burst Rate | 18fps electronic | 9fps electronic | ↓ |
| Battery Life | 200 shots (CIPA) | ~400 shots (CIPA) | ↑ |
| Weight | 422g (body only) | 427g (body only) | ↓ |
| Weather Sealed | Yes | Yes | |
| Viewfinder | No viewfinder | None: rear screen only | |
| Screen | 3.15" fixed touchscreen | 3.15" fixed touchscreen — primary interface | |
| Mount | Leica L-mount | L-mount (Leica/Panasonic/Sigma) | |
| Memory Cards | Single SD UHS-II slot (plus external USB SSD recording) | 230GB internal storage only — no card slot |
Compare side-by-side
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See fp and BF next to each other with our interactive comparison tool.
Get a personalised upgrade score
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Tell us what you shoot and we'll score the BF against your specific genres — not just specs.
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