Sigma fpvs A6400
Sigma
Sigma fp (2019)
Starting from £1499 new
Best for Creative filmmakers & experimental photographers
View Sigma fp
GearScore™ Verdict — Which should you buy?
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.
Content Creation & Vlogging — A6400 (2019): The best value APS-C Sony you can buy — especially used. Real-time Eye AF at this price point was transformative when it launched and still makes it one of the most reliable autofocus systems in the lineup.
Who should buy what
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
A6400 (2019)
- Vloggers and content creators who need a flip screen and reliable AF
- Photographers upgrading from a compact or smartphone
- Beginners who want room to grow into a full E-mount lens ecosystem
- Anyone prioritising autofocus performance at an accessible price
Quick take: The sigma fp has the highest resolution at 25mp; the a6400 is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | Sigma fp (2019) | A6400 (2019) |
|---|---|---|
| Price | £1,499 | £899 |
| Sensor | 24.6MP full-frame Bayer CMOS | 24.2MP APS-C Exmor CMOS BSI |
| Resolution | 24.6MP | 24.2MP |
| Video | 12-bit Cinema DNG RAW, 4K/24p, 1080p/120p | 4K/30p (6K oversampled, no crop), 1080p/120p slow-motion |
| Autofocus | Contrast-detect AF with face/eye detection | Phase-detect, 425 points, real-time Eye AF & animal AF |
| Stabilisation | None (lens-based only) | None (no IBIS) |
| Burst Rate | 18fps electronic | 11fps mechanical, 8fps with AF tracking |
| Battery Life | 200 shots (CIPA) | ~410 shots (CIPA) |
| Weight | 422g body only | 403g (body, battery, card) |
| Dimensions | 112.6 × 69.9 × 45.3mm | 120.0 × 66.9 × 59.7mm |
| Weather Sealed | No | No |
| Viewfinder | None | EVF, 2.36M dots, 0.70× magnification |
| Screen | 3.15" fixed touchscreen | 3.0" tilting touchscreen, 180° flip for selfie/vlog, 921k dots |
| Mount | Leica L-mount | Sony E-mount |
| Memory Cards | Single SD UHS-II + CFexpress Type B (via adapter) | Single SD UHS-I |
| Connectivity | USB-C 3.1, Wi-Fi, Bluetooth | Micro-USB, Wi-Fi, Bluetooth, NFC |
Suitability by genre
| Genre | Sigma fp | A6400 |
|---|---|---|
| Vlogging & Video | — | |
| Street | ||
| Travel | ||
| Portrait | ||
| Landscape | — | |
| Sports & Action | — | |
| Video | — | |
| Wildlife | — |
GearScore™ suitability scores are based on aggregated purchaser reviews weighted by photography genre. See how scores are calculated →
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