The sony vg c77am vertical control grip has been specially created for the sony alpha a77 a77 mark ii a99 mark ii digital slt cameras it provides a stable balanced grip for holding camera in verticalportrait format and a low position shutter release button for greater shooting comfort in addition all the main control buttons are duplicated in a convenient position on the grip for ease of use in either shooting position the sony vg c77 holds two high capacity np fm500h batteries sold s