Sony a6400 Mirrorless Camera Body, Black {24.2MP}

Sony a6400: APS-C mirrorless built around relentless autofocus

The a6400 pairs a 24.2MP APS-C Exmor CMOS sensor with the BIONZ X processor and a 425-point phase-detection AF system that acquires focus in approximately 0.02 seconds. Real-time Eye AF uses AI-based subject recognition to lock onto eyes and hold them sharp through erratic movement, partial obstructions, and backlit conditions. Real-time Tracking handles full-body subjects at speed, shifting automatically between body, face, and eye targets as distance changes. At 11 fps continuous with AF/AE active, the buffer holds up to 46 RAW frames or 116 JPEGs before slowing.

Video performance is built around full-pixel readout with 2.4x oversampling to produce UHD 4K at up to 30fps via XAVC S at 100 Mb/s. Full HD reaches 120fps for slow-motion work, and S-Log2/S-Log3 gamma profiles give colorists room to work in post. The 3.0-inch touchscreen tilts 180 degrees for self-facing recording, and a 3.5mm microphone input handles external audio sources directly. The body weighs 403g with battery and card, which keeps the whole kit manageable for day-long shoots.

At ISO 100-32,000 native (expandable to 102,400), the sensor handles low-light situations that would otherwise require flash or fast glass. The E-mount ecosystem covers everything from pancake primes to telephoto zooms, and the 1.5x crop factor brings extra reach from any focal length you already own. For a proven APS-C body with serious AF credentials, the a6400 has aged well in a competitive segment.

Who It's For

Wildlife and sports photographers working unpredictable subjects get real benefit from 11 fps burst shooting and a tracking system that holds focus across a moving frame. Content creators and vloggers rely on the 180-degree tilting touchscreen and Real-time Eye AF to stay sharp during self-recorded pieces without a monitor operator. Documentary and event videographers can use S-Log3 profiles and 4K at 100 Mb/s to deliver footage with enough latitude for grading. Portrait shooters who work in candid or semi-candid situations benefit from Eye AF that stays locked through subject motion and partial occlusion without manual intervention.

Key Features

• 24.2MP APS-C Exmor CMOS sensor with 14-bit RAW capture
• 425-point phase-detection AF system with 0.02-second acquisition
• Real-time Eye AF with AI subject recognition and Real-time Tracking
• 11 fps continuous shooting with AF/AE active; 46 RAW or 116 JPEG buffer
• UHD 4K at 30fps via XAVC S with 2.4x oversampling; 120fps Full HD
• ISO 100-32,000 native (expandable to 102,400) with BIONZ X processor
• 180-degree tilting 3.0-inch touchscreen LCD for vlogging and self-portraits
• Sony E-mount with 1.5x crop factor for expanded focal length reach

FAQ

How fast is the autofocus on the a6400?

The 425-point phase-detection AF system acquires focus in approximately 0.02 seconds. Real-time Eye AF locks onto eyes and maintains focus through movement, obstructions, and backlighting. Real-time Tracking automatically transitions between body, face, and eye targets as distance changes.

Can the a6400 shoot 4K video?

Yes. It records UHD 4K (3840 x 2160) at up to 30fps using XAVC S codec at 100 Mb/s with full-pixel readout and 2.4x oversampling. Full HD reaches 120fps for slow-motion work. S-Log2 and S-Log3 profiles provide up to 14 stops of dynamic range for grading flexibility.

Does the a6400 have in-body image stabilization?

No. The a6400 relies on optical stabilization in compatible Sony E-mount lenses with OSS. The camera communicates with lens stabilization systems for coordinated shake reduction.

What memory cards does the a6400 use?

It accepts SD, SDHC, SDXC (UHS-I), Memory Stick Duo Hybrid, microSD, and Memory Stick Micro formats. For 4K video, use UHS-I SD cards to maintain adequate write speeds.

Is the a6400 weather sealed?

The body features dust and moisture resistant construction with sealed buttons, dials, and seams. While designed for challenging conditions, it should be protected from heavy rain or submersion. Weather-sealed lenses maintain system protection for extended outdoor work.

How long does the battery last?

The NP-FW50 provides approximately 360 shots (viewfinder) or 410 shots (LCD) per charge. Video recording yields roughly 70 minutes (viewfinder) or 75 minutes (LCD) per battery. Spare batteries are standard for full-day shoots.

Can you flip the screen for vlogging?

Yes. The 3.0-inch touchscreen tilts up 180 degrees for self-facing recording and frame composition. Touch functions include Touch Focus, Touch Tracking, and Touch Shutter for intuitive operation during recording.