Sony A7 III vs Sony Alpha a9
Compare key differences and full specifications to find the camera that suits your photography.
Key differences
- Year: Sony A7 III: 2018 ; Sony Alpha a9: 2017
- Weight: Sony A7 III: 650 g ; Sony Alpha a9: 673 g
- Max. video mode: Sony A7 III: 4K 30p (3840 x 2160) ; Sony Alpha a9: 3840x2160 (30p/25p/24p)
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 A7 III | Sony Alpha a9 |
|---|---|---|
| General | ||
| Brand | Sony | Sony |
| Model | A7 III | Alpha a9 |
| Year | 2018 | 2017 |
| Body | ||
| Dimensions | 126.9 x 95.6 x 73.7 mm | 126.9 x 95.6 x 63 mm |
| Weight | 650 g | 673 g |
| Sensor | ||
| Sensor type | CMOS | CMOS |
| Sensor size | 35.6 x 23.8 mm | 35.6 x 23.8 mm |
| Sensor resolution | 6026 x 4017 | 6026 x 4017 |
| Crop factor | 1.01 | 1.01 |
| Total megapixels | 25.3 | 28.3 |
| Effective megapixels | 24.2 | 24.2 |
| Image | ||
| Max. image resolution | 6000 x 4000 | 6000 x 4000 |
| ISO | 100-25600 (expandable to 50 - 204800) | Auto, 100-51200 (expandable to 50-204800) |
| Exposure & Shutter | ||
| Min. shutter speed | 30 sec | 30 sec |
| Max. shutter speed | 1/8000 sec | 1/8000 sec |
| Metering | Multi, Center-weighted, Highlight-weighted, Spot | Multi, Center-weighted, Highlight-weighted, Spot, Average |
| Exposure compensation | ±5 EV (in 1/3 EV, 1/2 EV steps) | ±5 EV (in 1/3 EV, 1/2 EV steps) |
| Aperture priority | Yes | Yes |
| Shutter priority | Yes | Yes |
| White balance presets | 10.0 | 10.0 |
| Autofocus & Drive | ||
| Autofocus type | Fast Hybrid AF (phase + contrast detection) | — |
| AF phase-detection points | 693 | — |
| Max burst (mechanical shutter) | 10 fps | — |
| Stabilization | ||
| In-body stabilization (IBIS) | Yes, 5-axis sensor shift | — |
| Rated stops | 5 stops | — |
| Video | ||
| Max. video mode | 4K 30p (3840 x 2160) | 3840x2160 (30p/25p/24p) |
| Display & Viewfinder | ||
| Screen size | 3" | 3" |
| Screen resolution | 921,600 dots | 1,440,000 dots |
| Viewfinder | Electronic | Electronic |
| Storage & Connectivity | ||
| Storage types | SD/SDHC/SDXC, MS Duo/Pro Duo/Pro-HG Duo | SD/SDHC/SDXC/MS PRO Duo |
| USB | USB 3.0 (5 GBit/sec) | USB 2.0 (480 Mbit/sec) |
| Power | ||
| Battery | NP-FZ100 lithium-ion battery | NP-FZ100 lithium-ion battery |
| CIPA rated shots (EVF) | 610 shots | — |
| CIPA rated shots (LCD) | 710 shots | — |
| Lens & Focus | ||
| Digital zoom | Yes | Yes |