Sony a9 Overview
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| I own it | I want it | I had it |
The Sony Alpha a9 is the company's flagship full-frame mirrorless camera. It features a 24MP stacked CMOS sensor which permits 20 fps burst shooting without the 'blackout' found on traditional DSLRs courtesy of its electronic shutter. Its autofocus system has been improved, with a total of 693 phase-detect points covering 93% of the image area and Eye AF that's 30% better compared to the a7R II. The camera has an ISO range of 50-204,800 when fully expanded and 14-bit uncompressed Raws can be saved. It can also record oversampled UHD 4K video.
The magnesium alloy body is weather-sealed, has onboard 5-axis image stabilization, and offers two dials plus a joystick for selecting an AF point. The large EVF has 3.7 million dots and the tilting 3" LCD is touch-enabled. The a9 sports two SD card slots (thoug only one supports UHS-II media) plus an Ethernet jack allowing users to transfer files over FTP.
| Body type | SLR-style mirrorless |
| Max resolution | 6000 x 4000 |
| Effective pixels | 24 megapixels |
| Sensor size | Full frame (35.6 x 23.8 mm) |
| Sensor type | BSI-CMOS |
| ISO | Auto, ISO 100-51200 (expands to 50-204800) |
| Lens mount | Sony E |
| Focal length mult. | 1× |
| Articulated LCD | Tilting |
| Screen size | 3″ |
| Screen dots | 1,440,000 |
| Max shutter speed | 1/8000 sec |
| Format | MPEG-4, AVCHD, H.264 |
| Storage types | Dual SD/SDHC/SDXC slots (One of which UHS-II compatible) |
| USB | USB 2.0 (480 Mbit/sec) |
| Weight (inc. batteries) | 673 g (1.48 lb / 23.74 oz) |
| Dimensions | 127 x 96 x 63 mm (5 x 3.78 x 2.48″) |
| GPS | None |
The Sony a9 is more than just a refinement of the company's a7-series of full-frame mirrorless cameras; it's an evolution. With meaningful ergonomic and user interface improvements, the a9 is a polished and highly capable camera. It may not be a go-to camera for landscape and studio photographers, but its compact dimensions, silent operation, abundant speed and blackout-free shooting make it not only a step forward for mirrorless, but a compelling proposition for professionals who can't afford to miss a moment.
Good for: Sports, peak action, wedding, event and child photography, photojournalism
Not so good for: Landscape and studio photographers for whom resolution and dynamic range are important considerations
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