X Binocular Stereo Microscope
For a period after the Second World War, the Ina plant manufactured stereo microscopes developed in the prewar period. The magnification of prewar stereo microscopes was adjusted by changing the combination of objective and eyepiece lenses. The X binocular stereo microscope was designed to allow faster adjustment of magnification using a rotating drum to change lenses inside the barrel. Olympus also used an inclined microscope head design.