Sony a6400 User Guide

You bought the Sony a6400 because you wanted a compact mirrorless camera with serious autofocus, strong image quality, and real video capability. But if you have spent time scrolling through menus, wondering which focus mode to use, or staying in Auto because the settings feel overwhelming, you are not alone.

This guide was written to close that gap.

Sony a6400 User Guide: Practical, Illustrated Instructions for Camera Setup, Real-Time Autofocus, 4K Video, and Better Everyday Photography is an independent educational resource for new a6400 owners, hobby photographers, content creators, and everyday shooters who want to understand their camera clearly and use it with confidence.

Inside this guide, you will learn how to:

• Set up the Sony a6400 correctly from the beginning, including memory card preparation, first-boot settings, image quality choices, and Micro USB charging
• Understand the camera body, including the mode dial, exposure compensation dial, control wheel, Fn button, AF-ON button, Multi-Interface Shoe, EVF, tilting LCD, ports, and card slot
• Use the Sony E-mount system, APS-C crop factor, kit lens options, OSS lenses, and lens choices for portraits, travel, landscapes, everyday shooting, and video
• Move beyond Auto using Program, Aperture Priority, Shutter Priority, Manual mode, Scene modes, and Bulb exposure
• Control ISO, shutter speed, aperture, exposure compensation, metering modes, histograms, zebra patterns, and highlight alerts
• Use the a6400's 425-point phase-detection autofocus system, Real-Time Tracking, Real-Time Eye AF, AF-S, AF-C, Wide, Zone, Center, Flexible Spot, and Expand Flexible Spot
• Choose between JPEG and ARW RAW, adjust Creative Style and white balance, and understand D-Range Optimizer, Auto HDR, noise reduction, and lens correction settings
• Work with external flash through the Multi-Interface Shoe and connect external microphones using the 3.5mm microphone input
• Use single shooting, continuous shooting, self-timer, bracketing, interval shooting, and buffer management for real-world shooting situations
• Record 4K video, Full HD slow motion, S-Log2, S-Log3, Picture Profiles, audio levels, HDMI output, and video monitoring
• Review images with playback tools, histograms, highlight alerts, ratings, protection, in-camera RAW processing, and file management options
• Connect wirelessly with Wi-Fi, Bluetooth, NFC, Imaging Edge Mobile, remote shooting, smartphone image transfer, and GPS geotagging
• Customize the camera with custom buttons, AF-ON/back-button focus, My Menu, registered settings, display options, grid overlays, and the electronic level
• Apply practical starting setups for portraits, candids, events, landscapes, travel, everyday photography, 4K video, and slow-motion work

Whether you are opening the box for the first time or trying to finally understand the deeper features of a camera you already own, this guide gives you a practical path through the Sony a6400's controls, menus, autofocus system, image settings, and video tools.

Disclaimer: This is an independent publication. It is not affiliated with, sponsored by, endorsed by, authorized by, or approved by Sony Corporation or any of its subsidiaries. All product names and trademarks are the property of their respective owners and are used for identification and educational reference only.