1. leica Leica, a brand of camera produced by a German company with the same name, is composed of the first syllables of Lai Ci and camera. Originally known as Ernst Leitz Company, the company is now divided into three companies: Leica Camera Co., Ltd., Leica Geographic System Co., Ltd. and Leica Microsystems Co., Ltd., which produce cameras, geological survey equipment and microscopes respectively. "Leica" brand is owned by Leica Microsystems, and licensed by two other companies. Leica camera first appeared in 1913, which is the earliest 35mm camera in the world.

2. Lin Haofu began to produce folding cameras with Lin Haofu's own characteristics in 1929, and at the same time, he had to move the axis, lean over and swing. These combined movements were praised as German technology by people at that time. Another performance of German technology is paying attention to details, which is fully reflected in these two cameras: such as the three-layer extended and lowered bottom plate with the most stringent precision machining, the gear/tooth adjustment system of the upper and lower shafts in the front group and the matching lever operation. These are masterpieces of mechanical technology, so many people regard Lin Haofu as a camera that photographers need to own in their lives.

3. lumix Panasonic, Lumix is the trademark of Panasonic digital camera. "Lumix" (Chinese name: Laimei) refers to high-end products. Some cameras in LUMIX series use LEICA lenses.