The Precision Optical Instruments Laboratory that established its reputation for developing the "Hansa Canon" was transformed into the Precision Optical Industry, Co., Ltd. to start the full-scale production and sales of cameras. The company specialized in manufacturing high-quality 35mm cameras, and developed the unique "Serenar" lens with the motto that it would produce world class cameras. From the rubble in the war-torn plants, the company resumed the production of cameras by overcoming the difficulties in procuring basic materials.