In developing the EOS-1V as a next-generation professional SLR camera, Canon sought out the strongest available body materials for both functional attractiveness and high-level rigidity. The magnesium alloy used for the EOS-1V is lightweight, yet possesses exceptional strength. This new material is hard to machine and was initially thought to be unsuitable for molding the delicate curved surfaces of the EOS body. Canon solved this problem with the application of "thixo-molding", an advanced injection molding technology. Canon built the body of the EOS-1V to deliver top performance regardless of the shooting environment. Top priority was placed on the precise machining of all parts. The aperture and hybrid framework structure which serves is the base for various parts and fittings is diecast aluminum, with glass-fiber reinforced polycarbonate resin, which is equal in strength to metal. The main outside covers are made of magnesium alloy. The lightweight body benefits from remarkably improved rigidity, precision, and durability, realized by the optimum use of carefully chosen high-tech materials.