The Sony Alpha a6400 Mirrorless Digital Camera Body (Black) delivers advanced autofocus technology and 4K video capability in a compact APS-C package. Built around a 24.2MP Exmor CMOS sensor and BIONZ X processor, Sony rates autofocus acquisition at as fast as 0.02 seconds through 425 phase-detection AF points working alongside contrast-detection AF. Whether you photograph portraits, wildlife, sports, or create video content, the a6400 provides the speed and image quality that serious photographers and content creators require.

Sony Alpha a6400 Mirrorless Digital Camera

Key Features of the Sony Alpha a6400

The a6400 centers on Sony's Fast Hybrid AF system, which combines 425 phase-detection AF points with 425 contrast-detection AF points for reliable subject tracking across the frame. Real-time Eye AF detects and locks onto human eyes during both stills and video recording, maintaining focus even when subjects turn away or move through the scene. The camera tracks animals as well, making it practical for pet and wildlife photography.

High-density AF Tracking Technology follows erratically moving subjects while the system maintains focus down to EV -2 in low light. The 24.2MP sensor pairs with the BIONZ X image processing engine to deliver clean images at ISO sensitivities up to 32000 (expandable to 102400 for stills).

Video Performance for Creators

The a6400 records 4K video using full pixel readout with no pixel binning, pulling approximately 2.4x the data required for 4K (QFHD: 3840 x 2160) from the Super 35mm format sensor. This oversampling approach delivers detailed footage with accurate colors and minimal moire. High-bit-rate XAVC S recording at up to 100 Mbps captures broadcast-quality video, while HLG (Hybrid Log-Gamma) support enables HDR content production.

For slow-motion work, 120fps recording in Full HD provides smooth footage for post-production slowdown. S-Log2 and S-Log3 gamma curves offer up to 14 stops of dynamic range, giving colorists flexibility during grading. Interval shooting for time-lapse creation, simultaneous proxy recording, and clean HDMI output make the a6400 practical for professional video workflows.

Vlogging and Content Creation

The 3.0-inch, 921k-dot touchscreen tilts up 180 degrees, allowing content creators to frame themselves while recording directly to camera. Touch functions include Touch Focus for setting focus points, Touch Tracking to initiate subject tracking, and Touch Shutter to release the shutter. Fast Hybrid AF maintains focus during video recording, and the compact body pairs well with gimbals for stabilized mobile shooting.

Built-in Wi-Fi and NFC enable wireless transfer to smartphones and tablets for immediate sharing on social media. The 1:1 aspect ratio option captures square images ready for Instagram without cropping. The camera also connects to the Sony Imaging Edge Mobile app for remote control and location tagging.

Build Quality and Controls

The a6400 uses a magnesium alloy body with sealed buttons and dials for dust and moisture resistance. The low-vibration shutter mechanism is rated for approximately 200,000 cycles. Eight customizable buttons and controls allow assignment of 89 different shooting and replay functions, and My Menu lets you organize up to 30 frequently used settings for quick access.

The XGA OLED Tru-Finder electronic viewfinder displays high-contrast images with selectable refresh rates of 60fps or 120fps. Standard and high-quality display modes balance detail and responsiveness depending on shooting conditions.

Who Uses the Sony Alpha a6400

Content creators and vloggers use the a6400 for its flip-up screen, reliable autofocus, and 4K video capability. The Real-time Eye AF maintains sharp focus during pieces to camera, while the compact form factor makes it practical for travel and handheld work. Sports and wildlife photographers benefit from 11 fps burst shooting and the tracking performance of High-density AF.

Portrait photographers appreciate Real-time Eye AF for maintaining focus on subjects during movement. Travel and street photographers value the lightweight body and silent shooting option. Videographers working on documentaries, events, and commercial projects find the 4K recording, S-Log profiles, and professional audio support sufficient for client work.

The Sony E-mount system provides access to a wide range of lenses from Sony and third-party manufacturers. Pair the a6400 with prime lenses for portrait work, zooms for event coverage, or wide-angle options for vlogging. Browse our selection of digital mirrorless cameras to compare options across the APS-C and full-frame lineup.

FAQs

Does the Sony a6400 have in-body image stabilization?

The a6400 relies on lens-based Optical SteadyShot (OSS) stabilization available in compatible Sony E-mount lenses. When using lenses with OSS, the camera communicates with the lens stabilization system for effective shake reduction.

What memory cards does the Sony a6400 use?

The a6400 accepts SD, SDHC, SDXC, and Memory Stick media. For 4K video recording, use UHS-I SD cards to ensure adequate write speeds. A micro SD card slot is also available for compact storage options.

How long can the Sony a6400 record video continuously?

The a6400 records continuously for approximately 30 minutes per clip (NTSC/PAL standard limit). For extended recording sessions, the camera allows immediate restart after each clip ends. The NP-FW50 battery provides adequate power for typical shooting sessions, with spare batteries recommended for longer projects.

Can the Sony a6400 record slow motion video?

Yes. The a6400 records Full HD video at up to 120fps for in-camera slow-motion playback or post-production speed adjustment. This footage can be slowed to 5x when edited into a 24p timeline.

Is the Sony a6400 weather sealed?

The a6400 features dust and moisture resistant construction with sealed buttons, dials, and body seams. While designed to handle challenging conditions, the camera should be protected from heavy rain or submersion. For extended outdoor shooting, consider weather-sealed lenses to maintain protection throughout the system.

Shop the Sony Alpha a6400 at Samy's Camera

The Sony Alpha a6400 combines fast autofocus, 4K video capability, and a compact design that serves photographers and content creators working across multiple disciplines. With Real-time Eye AF, 11 fps burst shooting, and a 180-degree tilting touchscreen, this APS-C mirrorless camera handles portraits, sports, wildlife, and vlogging with equal capability. Samy's Camera offers fast shipping, expert support, and a complete selection of Sony camera accessories to build your kit.