Published: April 24, 2025

Sony has released a7S III Firmware Update 4.00 with major improvements to Shooting & Playback and FTP Transfer & Network functions.
The update process varies depending on which version of firmware your a7S III is currently running so please read these steps:

Applicable Model

ILCE-7SM3

Important precautions for updating from Ver. 2.11 or earlier

Update order: Ver. 2.15 → Ver. 3.01 → Ver. 4.00

• You must first update via Ver. 2.15 to Ver. 3.01 before proceeding to the latest version (Ver. 4.00).
• Attempting to update directly to Ver. 4.00 will cause an error.

Checking your System Software Version

Note: If the Date/Time setting screen appears when you turn on your camera, be sure to set the date or time to the correct values.
1. Select Menu → Setup → Setup Option → Version.
2. The system software version will be displayed.

For Imaging Edge Mobile App Users:

• Updated cameras cannot connect to the Imaging Edge Mobile app.
• Install the Creators’ App after updating the camera.
• Ensure the Imaging Edge Mobile app is Ver. 7.7.2 or later to pair the camera with the Creators’ App.
• If using an iPhone/iPad, restart the device after the camera update and then pair the camera with the Creators’ App.
• Update the Imaging Edge Mobile app if it is not the latest version before pairing with the Creators’ App.
• For instructions on installing and connecting the Creators’ App, please refer to this Guide for Migrating from the Imaging Edge Mobile app to the Creators’ App.

Is your firmware version later than Ver. 3.00?

No, Firmware Ver. 2.11 or earlier:
Update to Firmware Ver. 3.01 first and then to Ver. 4.00.
Firmware 3.01 for WIN
Firmware 3.01 for MAC

Yes, Firmware Ver. 3.00 or later:
Update to Firmware 4.00

Order Sony a7S III from B&H Photo | Amazon | Sony

Thank you for supporting this website through purchases from our affiliate partners! We always strive to bring you the best deals and lowest prices.