Sony FX3 & Sony FX30 share many similarities, but there are also important differences, such as quality, performance, features, design, and connectivity. If you want the best one between them, I Would recommend the Sony FX3 rather than the Sony FX30. 
Why Do I Recommend The Sony FX3?
- The Sony FX3 features a full-frame Exmor R CMOS sensor for capturing true cinematic depth and superior low-light detail, while the Sony FX30 uses a smaller APS-C/Super 35 sensor with a 1.5× crop factor.
- Sony FX3 has dual native ISOs of 640 and 12,800 to maintain cleaner footage in dim environments, whereas the Sony FX30 uses dual ISOs of 800 and 2500 with less sensitivity in extreme low light.
- It supports full-frame 4K 120 fps recording with no sensor crop to preserve wide-angle framing, whereas the Sony FX30 applies a 1.6× crop when shooting at 120 fps.
- The Sony FX3 achieves up to 15+ stops of dynamic range for greater highlight and shadow recovery in post-production, whereas the Sony FX30 delivers up to 14+ stops.
- Sony FX3 includes direct timecode I/O through its Multi Terminal port for synchronized multi-camera setups, while the Sony FX30 requires an adapter cable for timecode support.
- It delivers faster sensor readout for reduced rolling-shutter distortion during quick pans, whereas the Sony FX30’s slower readout results in more noticeable skew in motion.
- Sony FX3 includes the XLR top handle in the box for professional balanced audio recording with phantom-powered microphones, while the Sony FX30 requires purchasing the optional XLR handle kit.
Maybe the Sony FX30 price can make you comfortable because it’s a little bit cheaper than the Sony FX3. But you have to compromise all the above-mentioned features. Now the Decision is Yours. I hope it was helpful to choose the right one.
Side By Side Comparison
| Feature | Sony FX3 | Sony FX30 |
| Sensor Type | Full-frame Exmor R CMOS | APS-C/Super 35 Exmor R CMOS |
| Sensor Size | 35.6 × 23.8 mm | 23.3 × 15.5 mm |
| Dual Base ISO | 640 / 12,800 | 800 / 2500 |
| Native ISO Range | 80–102,400 | 100–32,000 |
| Dynamic Range | Up to 15+ stops | Up to 14+ stops |
| Crop Factor | None | 1.5× |
| Frame Rate (4K 120p) | No crop | 1.6× crop |
| Full-Frame Coverage | Yes | No |
| Autofocus Points | 627 phase-detect | 495 phase-detect |
| Eye AF Support | Human / Animal | Human / Animal / Bird |
| Rolling Shutter Performance | Lower distortion | Slightly higher distortion |
| Audio XLR Handle | Included | Optional |
| HDMI Port Type | Full-size HDMI Type-A | Full-size HDMI Type-A |
| Battery Life (Video) | Approx. 95 min | Approx. 100 min |
| Weight | 715 g | 646 g |
| USB Port | USB-C 3.2 Gen 1 | USB-C 3.2 Gen 2 |
| Timecode Support | Built-in via Multi-Terminal | Via Adapter Cable |
| Recording Format | 4K from 6K full readout | 4K from 6K Super 35 readout |
| Video Bit Depth | 10-bit 4:2:2 | 10-bit 4:2:2 |
| Sensor Readout Speed | Faster | Slightly slower |
| Low-Light Sensitivity | Higher | Moderate |
| Price | Check Sony FX3 Price | Check Sony FX30 Price |
Common Features
| Feature | Sony FX3 | Sony FX30 |
| BIONZ XR Processor | Yes | Yes |
| 4K Recording | Yes | Yes |
| 10-bit 4:2:2 Internal Recording | Yes | Yes |
| S-Cinetone Picture Profile | Yes | Yes |
| 5-Axis In-Body Image Stabilization | Yes | Yes |
| Active Cooling Fan | Yes | Yes |
| Dual Card Slots (CFexpress Type A / SD) | Yes | Yes |
| Full-size HDMI Type-A Port | Yes | Yes |
| Vari-Angle LCD Touchscreen | Yes | Yes |
| 3.5 mm Audio Jack | Yes | Yes |
| XLR Audio Support via Top Handle | Yes | Yes |
| 16-bit RAW Output via HDMI | Yes | Yes |
| Customizable Buttons | Yes | Yes |
| Tally Lamps (Front and Rear) | Yes | Yes |
| Gyro Data Support for Catalyst Browse | Yes | Yes |
| S-Log3 / S-Gamut3.Cine | Yes | Yes |
| USB-C PD Charging | Yes | Yes |
| Dust and Moisture Resistant Body | Yes | Yes |
| Built-in Wi-Fi and Bluetooth | Yes | Yes |
| Focus Breathing Compensation | Yes | Yes |
| Price | Checkn Sony FX3 Price | Check Sony FX30 Price |