Sony
FX3 2021
Best for Professional video, documentary & cinematic filmmaking
£2999
new today at Wex Photo Video
Decision tools · Compare
FX3 vs FX6
Quick take: The FX3 is the most affordable; only the FX3 is weather sealed.
36 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.
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?
FX3 — Professional Video, Documentary & Cinematic Filmmaking: The definitive run-and-gun cinema camera — A7S III sensor quality in a body built specifically for video professionals.
Who should buy what
FX3 (2021)
is the right camera for you if…
- 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
Full specificationsthe better value in each row is highlighted
| Specification | FX3Sony · 2021 | FX6Sony · 2020 |
|---|---|---|
| Price | £2,999Best | £5,220 |
| Sensor | 12.1MP full-frame BSI Exmor R CMOS (same as A7S III) | — |
| Resolution | 12.1MP | — |
| Video | 4K/120p, 4K/60p 10-bit, 12-bit RAW output, S-Log3, S-Cinetone | — |
| Autofocus | Real-time tracking with subject recognition (human, animal) | — |
| Stabilisation | 5-axis IBIS — 5 stops | — |
| Burst Rate | 10fps mechanical, 10fps electronic | — |
| Battery Life | ~640 shots (CIPA) | — |
| Weight | 715g (body only) | — |
| Dimensions | 129.7 × 78.0 × 84.5mm | — |
| Weather Sealed | YesBest | Not weather sealed |
| Viewfinder | None — monitor/external EVF use only | — |
| Screen | 3.0" touchscreen, fully articulating | — |
| Mount | Sony FE mount (full-frame E-mount) | Sony E |
| Memory Cards | Dual CFexpress Type A / SD UHS-II slots | — |
| Connectivity | USB-C (10Gbps), full-size HDMI, XLR via handle, Bluetooth, Wi-Fi | — |
| Sensor | Full frame | Full frame |
| Top video | 4K | 4K |
| 4K frame rate | 120 fps | 120 fps |
| Slow motion | — | 240 fps (HD) |
| RAW internal | Not internal | Not internal |
| Codecs | XAVC HS 4K (H.265), XAVC S 4K, XAVC S HD (H.264), XAVC S-I 4K, XAVC S-I HD, XAVC S-I DCI 4K | XAVC Intra (XAVC-I), XAVC Long (XAVC-L), XAVC Proxy |
| Log | S-Log3 | S-Log3 |
| Built-in ND | None — use lens filters or a matte box | Electronic variable, up to 7 stops |
| XLR inputs | 2 | 2 |
| SDI out | Not on this body | 12G-SDI |
| HDMI | Full-size | Full-size |
| Timecode | Yes | Yes |
| Dual native ISO | Yes | Yes |
| Autofocus | On-sensor phase detect (hybrid) | On-sensor phase detect (hybrid) |
| Stabilisation | In-body (IBIS) | No stabilisation |
| Battery | NP-FZ100 | Sony BP-U35 · Sony BP-U |
| Media | CFexpress Type A or SD + CFexpress Type A or SD | CFexpress Type A or SD + CFexpress Type A or SD |
| Record limit | No limit, with a cooling fan | No limit (cinema camera), with a cooling fan |
| Lens mount | Sony E | Sony E |
| Body weight | 715 gBest | 890 g |
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
FX3
FX6
Portrait
5.7/10
—
Street
4.3/10
—
Travel
5.5/10
—
Wedding & Events
6.0/10
—
Vlogging & Video
6.1/10
—
Filmmaking
9.1/10
—
Documentary
8.0/10
—
Sports & Action
5.5/10
—
Landscape
4.7/10
—
Wildlife
5.8/10
—
Casual
4.9/10
—
Food
6.7/10
—
Macro
5.5/10
—
Architecture
5.2/10
—
Astrophotography
6.7/10
—
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 →
Next
More comparisons with FX3
Camera family history