Published: October 30, 2025
Sony releases Alpha 1 II Firmware Update 4.00 packed with new features including Real-time Recognition AF+ with improved subject detection and tracking capabilities, Preset Focus and Film 2, Film 3 Creative Looks.
Applicable Model
This information is for the following models: ILCE-1M2
Benefits and Improvements
• Adds support for Real-time Recognition AF+ with improved subject detection and tracking capabilities
• Adds support for the Preset Focus function with lenses that do not have power zoom, including Sony’s manual zoom E-mount lenses
- • The registered positions of preset focus/zoom are incompatible before and after the camera software update. Please re-register the preset focus/zoom after the update.
• Some zoom lenses without power zoom are not supported. For more details, please visit the following link: https://support.d-imaging.sony.co.jp/www/cscs/lens_body/
• Adds FL2 (Film 2) and FL3 (Film 3) to the Creative Look options
• Improves the metering accuracy when using bounce flash
• Optimizes the battery level display
• 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.
• Improves the operational stability of the camera
Notes:
• If you are using the Camera Remote SDK (Software Development Kit), please check the Camera Remote SDK website for a list of supported devices, download instructions, and FAQs.
• The Camera Remote SDK may be unavailable in some countries or regions.
• Please refer to the Help Guide for details on all updated functions.
Previous Benefits and Improvements
All Previous Benefits and Improvements are Included in this update.
File Info
Name: BODYDATA.DAT
Version: 4.00
Size: 1 194 332 648 bytes
Release Date: 10-30-2025
Download Links:
Saving Firmware to a Memory Card
IMPORTANT: Make sure there is only one BODYDATA.DAT file on the memory card.
• Click the Download button.
• After reading the disclaimer, click Download.
• Save the file to a computer.
• Insert the formatted memory card into the computer.
• Save the BODYDATA.DAT file in the root directory of the memory card.
Please Note: The file name must say BODYDATA.DAT. If you have downloaded Sony Firmware Updates in the past without deleing them, your computer may rename the update BODYDATA-2.DAT, BODYDATA-3.DAT, etc. You must change the filename back to BODYDATA.DAT before running the update.
Notes:
• Please format the memory card in advance using this product.
• Before formatting, copy the data to a computer or other device.
• Once you format the memory card, all the data recorded on the memory card will be deleted and cannot be restored.
• Please refer to the instruction manual of the camera for compatible memory cards.
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