Sony a7S III vs Sony FX3
Compare key differences and full specifications to find the camera that suits your photography.
Key differences
- Year: Sony a7S III: 2020 ; Sony FX3: 2021
- Weight: Sony a7S III: 614 g ; Sony FX3: 715 g
- Autofocus type: Sony a7S III: Fast Hybrid AF (phase + contrast detection) ; Sony FX3: Fast Hybrid AF (phase-detection + contrast-detection)
- In-body stabilization (IBIS): Sony a7S III: Yes, 5-axis sensor shift ; Sony FX3: Yes
- Max. video mode: Sony a7S III: 4K 120p (3840 x 2160) ; Sony FX3: 4K 120p
- Battery: Sony a7S III: NP-FZ100 lithium-ion battery ; Sony FX3: NP-FZ100
Best for
The available specifications do not establish a clear advantage for a particular use. Choose based on the features you need below.
| Specification | Sony a7S III | Sony FX3 |
|---|---|---|
| General | ||
| Brand | Sony | Sony |
| Model | a7S III | FX3 |
| Year | 2020 | 2021 |
| Category | — | cinema |
| Body | ||
| Dimensions | 128.9 x 96.9 x 69.7 mm | 129.7 x 77.8 x 84.5 mm |
| Weight | 614 g | 715 g |
| Weight (body only) | — | 630 g |
| Sensor | ||
| Sensor type | CMOS | Exmor R CMOS |
| Sensor size | 35.6 x 23.8 mm | 35.6 x 23.8 mm |
| Sensor resolution | 4260 x 2840 | — |
| Crop factor | 1.01 | — |
| Total megapixels | 12.9 | 12.9 |
| Effective megapixels | 12.1 | 12.1 |
| Image | ||
| Max. image resolution | 4240 x 2832 | — |
| ISO | Auto, 80-102400 (extends to 40-409600) | Still: 80–102400; expandable 40–409600 |
| Exposure & Shutter | ||
| Min. shutter speed | 30 sec | — |
| Max. shutter speed | 1/8000 sec | — |
| Metering | Multi, Center-weighted, Spot | — |
| Exposure compensation | ±5 EV (in 1/3 EV, 1/2 EV steps) | — |
| Aperture priority | Yes | — |
| Shutter priority | Yes | — |
| White balance presets | 10.0 | — |
| Autofocus & Drive | ||
| Autofocus type | Fast Hybrid AF (phase + contrast detection) | Fast Hybrid AF (phase-detection + contrast-detection) |
| AF phase-detection points | 759 | — |
| AF points (stills) | — | 759 |
| AF points (movies) | — | 627 |
| Max burst (mechanical shutter) | 10 fps | — |
| Stabilization | ||
| In-body stabilization (IBIS) | Yes, 5-axis sensor shift | Yes |
| Stabilization axes | — | 5 |
| Rated stops | 5.5 stops | 5.5 |
| Video | ||
| Max. video mode | 4K 120p (3840 x 2160) | 4K 120p |
| Bit depth | — | 10-bit |
| Codecs | — | XAVC HS / H.265, XAVC S / H.264, XAVC S-I / H.264 |
| RAW video output | — | 16-bit RAW via HDMI, 4264 × 2408 up to 59.94p |
| Video ISO range | — | 80–102400; expandable to 409600 |
| Display & Viewfinder | ||
| Screen size | 3" | — |
| Screen resolution | 1,440,000 dots | — |
| Screen size (in) | — | 3 |
| Screen resolution (dots) | — | 1440000 |
| Touchscreen | — | Yes |
| Viewfinder | Electronic | — |
| Built-in viewfinder | — | No |
| Storage & Connectivity | ||
| Storage types | SD/SDHC/SDXC/MS Pro Duo/CFexpress | — |
| Storage slot 1 | — | SD + CFexpress Type A |
| Storage slot 2 | — | SD + CFexpress Type A |
| USB | USB 3.0 (5 GBit/sec) | USB-C 5 Gbps + Multi/Micro USB |
| Wi-Fi | — | 2.4/5 GHz |
| Bluetooth | — | 5.0 |
| HDMI | — | Full-size HDMI Type-A |
| Microphone input | — | Yes |
| Headphone output | — | Yes |
| Power | ||
| Battery | NP-FZ100 lithium-ion battery | NP-FZ100 |
| CIPA rated shots | — | 580 |
| CIPA rated shots (EVF) | 510 shots | — |
| CIPA rated shots (LCD) | 600 shots | — |
| Lens & Focus | ||
| Lens mount | — | Sony E |
| Digital zoom | Yes | — |