... camera cranes,6m-8m manned cranes,thres-axis electronic control heads,3Delectronic control heals,stainless steel tracks,rubber teacks,shock absorber, ... human body engineering .It only needs one through the remote control the camera pitch ,rotation,focus and aperture .The pitch ... can be set ,video button CAM of the body start /stop control Aperture /focusing lens servo system is available for Canon and ...