I am now running v.2.0 on my A900, check it out.
http://esupport.sony.com/US/perl/swu-do ... 1&os_id=49
This utility updates the camera firmware to version 2.00 and provides the following benefits:
Adds the ability to release the shutter even when no lens is mounted on the camera.
Expands the Exposure Compensation range to ± 5 EV.
Note: The range before the update is ± 3 EV.
Adds a new Bracket Shooting setting to allow a deviation of 3.0 EV.
Note: The maximum deviation setting before the update is 2.0 EV.
Improves the auto focus (AF) speed. This is especially noticeable when using a telescopic lens.
Note: The improvement varies depending on the lens used and shooting conditions