The ARRI SCH-1 attaches to the top of the ALEXA, ALEXA Plus, ALEXA Plus 4:3, ALEXA Studio, ALEXA XT, ALEXA XT M, ALEXA XT Plus or ALEXA XT Studio camera and provides numerous 3/8"-16 UNC threaded mounting points for accessory mounting. Front extension must be taken off when used with ALEXA Studio or ALEXA XT Studio and OVF-1. Includes Adjustable Center Grip Medium (ACG-1) for use with top mounted batteries of different heights.