Sigma fpvs FX3
Sigma
Sigma fp (2019)
Starting from £1499 new
Best for Creative filmmakers & experimental photographers
View Sigma fp
Sony
FX3 (2021)
Starting from £3799 new
Best for Professional video, documentary & cinematic filmmaking
View FX3
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.
Professional Video, Documentary & Cinematic Filmmaking — FX3 (2021): The definitive run-and-gun cinema camera — A7S III sensor quality in a body built specifically for video professionals.
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
FX3 (2021)
- Professional videographers and filmmakers who need cinema-quality colour science in a compact body
- Documentary and run-and-gun shooters who need 4K/120p and built-in XLR audio
- Sony A7S III owners who want a purpose-built video body alongside their stills camera
- Gimbal and drone operators who need a compact full-frame cinema camera
Quick take: The sigma fp has the highest resolution at 25mp; the sigma fp is the most affordable; only the fx3 is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | Sigma fp (2019) | FX3 (2021) |
|---|---|---|
| Price | £1,499 | £3,799 |
| Sensor | 24.6MP full-frame Bayer CMOS | 12.1MP full-frame BSI Exmor R CMOS (same as A7S III) |
| Resolution | 24.6MP | 12.1MP |
| Video | 12-bit Cinema DNG RAW, 4K/24p, 1080p/120p | 4K/120p, 4K/60p 10-bit, 12-bit RAW output, S-Log3, S-Cinetone |
| Autofocus | Contrast-detect AF with face/eye detection | Real-time tracking with subject recognition (human, animal) |
| Stabilisation | None (lens-based only) | 5-axis IBIS — 5 stops |
| Burst Rate | 18fps electronic | 10fps mechanical, 10fps electronic |
| Battery Life | 200 shots (CIPA) | ~640 shots (CIPA) |
| Weight | 422g body only | 715g body only (with XLR handle) |
| Dimensions | 112.6 × 69.9 × 45.3mm | 129.7 × 78.0 × 84.5mm |
| Weather Sealed | No | Yes |
| Viewfinder | None | None — monitor/external EVF use only |
| Screen | 3.15" fixed touchscreen | 3.0" touchscreen, fully articulating |
| Mount | Leica L-mount | Sony FE mount (full-frame E-mount) |
| Memory Cards | Single SD UHS-II + CFexpress Type B (via adapter) | Dual CFexpress Type A / SD UHS-II slots |
| Connectivity | USB-C 3.1, Wi-Fi, Bluetooth | USB-C (10Gbps), full-size HDMI, XLR via handle, Bluetooth, Wi-Fi |
Suitability by genre
| Genre | Sigma fp | FX3 |
|---|---|---|
| Vlogging & Video | ||
| Street | ||
| Travel | ||
| Portrait | ||
| Landscape | — | |
| Sports & Action | — | |
| Low Light | — | |
| Wedding | — |
More comparisons with Sigma fp
Camera family history