Sony has released a9 Firmware Update 3.01 with a fix to a bug reported in the previous version 3.00 while optimizing a9 for the FE 400 2.8 GM OSS along with improvements in autofocus and flash performance. This update (version 3.01) provides the following benefits:. Corrects a condition where the camera may not operate properly after updating to firmware version 3.00 Note: For cameras updating from version 3.00 to 3.01, the registered settings for the Fn (function) menu may not be inherited. You may need to customize the menu to your preferred settings again. New lens support (SEL400F28GM). Optimization of optical image stabilization performance, and support for new image stabilization mode of the lens (Mode 3).
This utility upgrades the firmware to version 1.01 and provides the following changes. Download and Transfer the Update to Your USB Storage Device.
Addition of Function Ring(Lens) to the menu Note: For the SEL400F28GM lens, the APS-C S35/Full Frame Sel. Setting is assignable to the Function Ring in addition to Power Focus.
Addition of Aperture Drive in AF to the menu Note: With the SEL400F28GM lens, focus will not be locked even during continuous shooting at F-values greater than F11 under the following conditions: AF-C, electronic shutter, and the Aperture Drive in AF menu set to Focus Priority.