Leica camera (Leica) is a famous German camera brand. Leica is a world famous optical brand, the company is currently divided into three, including Leica camera, Leica measurement systems (production of Leica rangefinder, Leica total station, etc.), Leica microscopic systems (holding the "Leica" brand, authorized the use of the other two). The Leica camera was officially launched in 1925 and was the first 35mm camera.