1, Sony / SONY: Japan's well-known enterprises, began in 1946, Japan's representative enterprises, the world's electronic 3C / games / finance / entertainment giant, large-scale integrated multinational enterprise group, is across the electronic 3C, games, finance, entertainment field of the world giant.
2, Canon / Canon: the world's top 500 companies, Japan's multinational corporations, to professional imaging and optical products, including the manufacture of cameras, video cameras, copiers, computer printers and medical equipment.
3, Sigma / sigma: the world's leading camera lens manufacturers, Japan's leading camera company, was founded in 1961, the company only set up factories in Japan, the monthly production of lenses is 100-180,000, the introduction of the lens is also quite a lot of focal lengths ranging from 8mm-800mm.