Like all M-Series lampheads, the M90 is equipped with MAX Technology, a unique, patented reflector design that unifies the advantages of a Fresnel and a PAR fixture. The unit is open-faced and very bright; it is also focusable from 16° up to 49°, producing a remarkably even light field and a crisp, clear shadow. ARRI technology partner Osram developed a new 9,000 W lamp for the M90, which is stable at 1,000 Hz and almost as small as the 6,000 W lamp that can alternatively be used. This allowed ARRI to design the M90 in a very compact housing, barely larger than the ARRISUN 60.