Sony Suspends a7 IV Firmware Update 6.00 Following Widespread Camera Malfunctions

Firmware Update

by Nino LeitnerDecember 1^st, 2025

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Sony has suspended firmware version 6.00 for the a7 IV mirrorless camera after confirming that some units experience unstable operations including repeated reboots following installation. The company is investigating the cause while the a7R V version 4.00 update, released simultaneously, remains available.

The suspension comes just days after Sony released major firmware updates for both cameras on November 25. Users who have already installed the a7 IV update and are experiencing issues should contact Sony support directly.

What went wrong

According to Sony’s official notice posted today, the company has identified two distinct problems. The more serious issue involves unstable operations that manifest as repeated reboots immediately after installation, potentially rendering the camera unusable.

A second bug causes the camera to enter power saving mode whenever the monitor is closed, regardless of the Power Save by Monitor settings. Sony notes this can be resolved by initializing all camera settings to factory defaults, though this requires users to reconfigure their entire setup.

User reports and community reaction

Photography communities have documented various experiences with the problematic firmware. Some users report increased crash frequency, with screens staying on or going blank when attempting to power cycle, requiring battery removal to restore functionality.

The incident has reignited criticism of Sony’s firmware development practices. Professional users expressed frustration over what they perceive as inadequate quality control testing. Several commenters noted they deliberately wait months after firmware releases before updating cameras used for professional work.

Professional implications

For working professionals, this suspension highlights the risks of updating mission-critical camera firmware immediately upon release. While updates often bring valuable features and workflow improvements, the potential for camera-bricking bugs can leave photographers without functioning equipment at crucial moments.

The timing proves particularly unfortunate given the feature-rich nature of the 6.00 update, which included expanded autofocus options, improved video workflow tools, and enhanced FTP transfer capabilities. These features will remain unavailable to a7 IV users until Sony resolves the stability issues.

What happens next

Sony has not provided a timeline for when corrected firmware might become available. The company’s brief statement indicates they are still investigating the root cause, suggesting the fix may require more than a simple patch.

Users who successfully installed firmware 6.00 without experiencing issues should avoid factory resetting their cameras or making significant changes that might trigger the reported bugs. Those who have not yet updated should continue using their current firmware version until Sony releases a stable replacement.

Have you experienced issues with the a7 IV firmware 6.00 update, or does this incident change your approach to installing camera firmware updates? Don’t hesitate to let us know in the comments below!