First released in 1971 and produced through to the late 1980s, this was the first high quality zoom designed for motion picture photography by Cooke, elements of which remain the basis for all Cooke zooms produced to this day. Available in it’s original S35 form as a 20-100mm or with the high quality Optica Magnus Open Gate expander installed to cover OG on Alexa 35 with only half a stop of light loss.