Sony Releases Alpha 1 Firmware Update 4.00

Published: December 10, 2025

Applicable Model

This information is for the following models: ILCE-1

Benefits and Improvements

• Adapts the display layout of shooting information for both horizontal and vertical viewing
• Adds the Spot: XL and Spot: XS options to the Spot section of the Focus Area menu
• Adds the Custom 1, Custom 2, and Custom 3 options to the Custom section of the Focus Area menu
• Adds the Tracking: Spot XL, Tracking: Spot XS, Tracking: Custom 1, Tracking: Custom 2, and Tracking: Custom 3 options to the Tracking section of the Focus Area menu
• Allows simultaneous deletion and rating of images stored on both memory card slot 1 and slot 2
• Allows the display of folder and file names during playback
• Allows you to cancel the scheduled transfer of selected images during FTP transfer
• Adds support for the following Transfer & Tagging settings:
• A setting to automatically schedule FTP transfer of protected still images from FTP Import
• A setting to automatically schedule FTP transfer of protected still images and videos from FTP Upload Preset
• A setting to automatically protect still images transferred via FTP from FTP Upload Preset
• The latest version of the Transfer & Tagging app is necessary.
• The Transfer & Tagging setting may not be available in some countries or regions.

• Supports the following Monitor & Control app functions:
• Focus map display
• IRIS operation bar display
• The latest version of the Monitor & Control app is necessary.
• The Monitor & Control app may not be available in some countries or regions.

• Supports the Write Digital Signature function for movies as part of Sony’s Camera Authenticity Solution
• The timing for the provision of licenses (paid) to customers other than certain media outlets is yet to be determined.
• Services may not be available in some countries or regions. For more information, please visit the Authenticity Catalog Page.
• Supports Scan and Tag, Photo Cropping, and Volume Photography Commands under the Volume Photography License
• Installation of a paid license is required for use.
• Services may not be available in some countries or regions.

• No longer supports the Security (IPsec) functionality. Please enable and use Access Authen. for enhanced protection and security
• No longer supports WPA and WEP functionalities. You will no longer be able to select WPA or WEP when connecting to Wi-Fi. • Please use the more secure WPA2 or WPA3 security setting moving forward
• Fixes an issue where continuous shooting may not resume for 1 to 2 seconds after the end of a continuous shooting session
• Fixes an issue where the multi-selector on the vertical grip may not function correctly
• Improves the operational stability of the camera
Note: Please refer to the Help Guide for details on all updated functions.