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Sony has released a new firmware update for the A7S III, bringing improved performance, bug fixes, and new features. This guide covers everything you need to know—how to install the update, what’s new, and troubleshooting tips.
Why Update Your Sony A7S III Firmware?
The latest firmware (Version X.XX) includes:
- Improved autofocus – Better tracking for video & stills
- New video features – Enhanced codec support
- Bug fixes – Stability improvements
- New menu options – Customizable controls
⚠️ Important Before Updating
Never turn off the camera during an update! Ensure:
- Battery is fully charged (or use AC power)
- Use a formatted memory card
- Download firmware from official Sony sources only
How to Install Sony A7S III Firmware Update
Step 1: Check Current Firmware Version
- Turn on your A7S III
- Go to Menu > Setup > Version
- Note the current version
If already on the latest version, no update is needed.
Step 2: Download the Firmware
- Visit Sony’s Support Page
- Search for "A7S III firmware"
- Download the .UPDATE file for your OS (Windows/Mac)
File example: ILCE7SM3VXXX.exe (Windows) or ILCE7SM3VXXX.dmg (Mac)
Step 3: Prepare the Memory Card
- Insert a formatted SD card into your computer
- Create a folder named PRIVATE > UPDATE
- Copy the firmware file into the UPDATE folder
- Safely eject the card
Step 4: Install the Update
- Insert the card into the A7S III
- Go to Menu > Setup > Version > Software Update
- Select "Execute" and wait (5-10 mins)
- Do not turn off the camera!
- Camera will restart automatically
Step 5: Verify the Update
- Go back to Menu > Setup > Version
- Confirm the new version is displayed
- Test new features (e.g., autofocus improvements)
New Features in Sony A7S III Firmware X.XX
🎥 Enhanced Video Features
- New 4K 120p All-I recording option
- Improved S-Cinetone color science
- Added custom LUT support
📷 Autofocus Improvements
- Better eye-tracking in video mode
- Improved low-light AF performance
- New subject recognition modes
⚙️ Usability Upgrades
- New customizable quick menu options
- Added breathing compensation for select lenses
- Fixed minor bugs stability issues
Troubleshooting Sony A7S III Firmware Issues
❌ Update Fails to Start
- Check if the file is in the correct folder (PRIVATE/UPDATE)
- Try a different SD card
- Reformat the card in-camera before copying files
🔄 Camera Freezes During Update
- Do not turn off the camera! Wait 10+ minutes
- If stuck, remove the battery and restart the process
- Contact Sony Support if the issue persists
⚠️ Firmware Version Not Updating
- Ensure you downloaded the correct firmware file
- Try reinstalling the update
- Reset camera settings (Menu > Setup > Reset)
Frequently Asked Questions (FAQ)
❓ Is the Sony A7S III firmware update free?
Yes! Sony provides firmware updates at no cost.
❓ Can I downgrade to an older firmware version?
No, Sony does not officially support firmware downgrades.
❓ Will updating erase my settings?
Usually no, but it’s good practice to note your configurations.
❓ How often does Sony release firmware updates?
Every 6-12 months, with occasional bug-fix updates.
Final Thoughts
The latest Sony A7S III firmware update brings meaningful improvements for both photographers and videographers. By following this guide carefully, you can safely install the update and take advantage of new features.
Need help? Leave a comment below!
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