The mid-range APS-C lineup of Sony has boosted with the launch of the 24-megapixel A6400 mirrorless camera. The A5100 is much similar to its predecessor and has much-improved specs with 4K 30fps video and a flip-up touch screen, and will be especially ideal for video-bloggers. The A6400 is also getting a bunch of features from its full-frame A7 III and A9 siblings, like 425-point contrast- and phase-detect autofocus with the “world’s fastest” .02 second AF speed, along with real-time subject tracking and eye AF.
The A6400 packs an all-new 24.2-megapixel Exmor APS-C sensor and next-gen BIONZ X image processor. It can handle high-speed continuous shooting at up to 11 fps with the mechanical shutter or 8 fps in silent shooting mode, both with continuous autofocus and auto-exposure tracking (you can capture up to 116 JPG frames or 46 RAW before the buffer fills up). Sony has indicated that it is best as compared to other recent APS-C cameras, most notably Fujifilm’s pricier X-T3. As for low-light performance, you can shoot at up to 32,000 ISO or 102,400 expanded with less noise.
Sony’s eye AF is the most popular feature on the A7 III series, and the A6400 takes that even farther. The advanced “real-time eye AF” deploys artificial intelligence to automatically detect a subjects’ eyes in real-time, improving focus accuracy, speed, and tracking. That tracking now includes animals’ eyes, so you can keep Fluffy or Spot’s eyes in focus, even at shallow depth-of-field. The feature is now enabled by default (unless you shut it off), letting you either automatically or manually choose which eye to track. Real-time subject tracking, meanwhile, crunches depth, color, pattern, and other spatial info to quickly and accurately follow your subject.
The A6400 has the ability to capture 4K at the sensor’s full resolution, then oversample to deliver pin-sharp 4K footage, much as the A6500 does. You can also shoot 1080p at up to 120 fps. Sony promises that movie focusing is fast and stable using hybrid AF tech, and the display, which entirely flips around for video-bloggers. There’s a hybrid-log gamma feature to maximize image quality, along with a microphone port, but no headphone jack.