The Alexa camera was conceived as a digital 'film' camera and to that end ARRI have . Anamorphic Film using ProRes 2K SXS, Alexa Plus/Studio. The Arri Alexa (stylised as ΛLEXΛ) is a digital motion picture camera system made by Arri first The ALEXA Plus added integrated wireless remote control, the ARRI Lens Data System (LDS), additional outputs, lens synchronization Further improvements are an internal ND filter unit, a sensor and a quieter cooling fan. Arri Alexa XT Plus Digital Cinema Camera. resolution ArriRaw recording, the XT is equipped with K Open Gate mode allowing the camera to capture a.