Sony Alpha A6400 Mirrorless Camera Brings the World’s Fastest Autofocus & More

Mirrorless cameras are all the rage these days, especially the ones made by Sony. Sony has been in the game for a long time and has some really great options out there.

The a6500, launched in late 2016, was thought to the successor of the a6300 which was launched in early 2016 and while both were great cameras, an upgrade was badly needed.

Now, Sony has unveiled the successor to the a6300, the a6400. It sits below the a6500 and is an upgrade over the a6300, which will be discontinued shortly.

Sony Alpha A6400

The a6400 comes with a 24.2MP APS-C Exmor CMOS sensor. This is combined with the same BIONZ X image processor that is found in some higher-end models like the A9, A7 III, and A7R III.

The a6400 has an ISO range up to 102,400 and the processing speed is now 1.8x faster than the a6300. The new processor also enables the camera to provide better image quality and improved skin tones in still images.

As for the autofocus, we also see an improvement here. Sony claims that the a6400 has the world’s fastest autofocusing mechanism, achieving perfect focus in just 0.02 s. Moreover, Real-Time Eye AF is available with AI-based subject recognition and you can even prioritize which eye to focus on in the menu.

All of this is made possible by the a6400 having a 425-point phase-detect system which is further helped by 425 contrast AF points, covering up to 84% of the frame.

Taking advantage of such a fast autofocusing system, the a6400 can continuously shoot photos with speeds of up to 11fps, or 8fps if you don’t want the viewfinder to blackout. Shooting in silent mode sees a major upgrade with up to 8fps over the 3fps of the a6300.

Apart from all the technical details, the camera is ideal for vloggers. You can flip-out the 3.0-inch screen, which also happens to be a touch screen, and rotate it outwards 180 degrees. You can shoot 4K videos at 24 or 30fps or 1080p at 120fps. The shutter life for the a6400 is rated at 200,000 cycles.

Major Features

  • 24.2MP APS-C Exmor CMOS Sensor
  • BIONZ X Image Processor
  • XGA Tru-Finder 2.36m-Dot OLED EVF
  • 3.0″ 921.6k-Dot Tilting Touchscreen LCD
  • Internal UHD 4K Video & S-Log3 Gamma
  • S&Q Motion in Full HD from 1-120 fps
  • Shutter Rated for 200,000 Cycles
  • Built-In Wi-Fi with NFC
  • 425 Phase- & Contrast-Detect AF Points
  • Up to 11 fps Shooting and ISO 102,400


The body-only version of the Sony a6400 will go on sale in February for $900. A version with Sony’s own 16-50mm PZ kit lens will be available for $1000 and 18-135mm for $1,300.

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