Canon Inc. is a Japanese multinational corporation that specialises in the manufacture of imaging and optical products, including cameras, camcorders, photocopiers, steppers and computer printers.

Its headquarters are located in Ōta, Tokyo, Japan.

Nikon Corporation, also known as just Nikon, is a multinational corporation headquartered in Tokyo, Japan, specializing in optics and imaging.

Its products include cameras, binoculars, microscopes, measurement instruments, and the steppers used in the photolithography steps of semiconductor fabrication, of which it is the world's second largest manufacturer.

Panasonic Corporation, is a Japanese multinational consumer electronics corporation headquartered in Kadoma, Osaka, Japan.[

Its main business is in electronics manufacturing and it produces products under a variety of names including Panasonic and Technics.

The Samsung Group, is a multinational conglomerate corporation headquartered in Samsung Town, Seoul, South Korea.

The Samsung Group comprises numerous international affiliated businesses, most of them united under the Samsung brand including Samsung Electronics.

Sony Corporation, commonly referred to as Sony, is a Japanese multinational conglomerate corporation headquartered in Minato, Tokyo, Japan and the world's fifth largest media conglomerate with US$86.64 billion (FY2011).

Sony offers a range of digital cameras, ranging from point-and-shoot models to digital SLRs.