PENTAX Corporation is a Japanese group known worldwide for it's cameras, medical equipment, vedio survalence and industrial vision products, as well as ophtalmic lenses.

Created in 1919 with the name Asahi Optical Joint Stock Co., the group mailny produces opthalmic lenses. It changes it's name in 1938 and becomes Asahi Optical Co., LtD. and starts producing optics for cameras, bulding up it's good name.

The name PENTAX comes from the combination of Pentaprism - a five-sided prism used in the viewfinder of a reflex camera to make image appear straight, as it's normally seen, after rotation and inversion of the mirrors - and Contax - a brand of small, middle-size and digital cameras.