A:Answer Hi chief, Yes. This lens is compatible with the Sony a9 camera, but with restrictions:
-The angle of view will be narrowed down to that of APS-C size.
-The [Lens Comp.: Distortion] setting will be set to "Auto."
-You can change the operating direction of the zooming ring by upgrading the lens software to Ver. 02 or later.
-In Continuous Shooting Hi mode, the maximum speed of continuous shooting with AF tracking is 15 frames per second.
Regards,
Vincent