Sony Alpha a9: Digital Photography Review



Announced
Apr 19, 2017

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 (both support UHS-II media) plus an Ethernet jack allowing users to transfer files over FTP.


First impressions review,
Apr 23, 2017



















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 (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

See full specifications



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