Kenko
Encyclopedia
is a Japan
Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

ese manufacturer and trading company of photographic accessories, especially known for its filters. Located in Tokyo, they have been producing conversion lenses since the 1960s. They produce camera lenses under the Tokina
Tokina
is a Japanese manufacturer of photographic lenses and CCTV security equipment.-History:Tokina, become a partner of Pentax, division of Hoya Corporation and jointly developed some lenses. These will be available under the Pentax and Schneider Kreuznach D-Xenon and D-Xenogon brands in Pentax K mount...

 brand name. They also manufacture a beginner's 35 mm
135 film
The term 135 was introduced by Kodak in 1934 as a designation for cartridge film wide, specifically for still photography. It quickly grew in popularity, surpassing 120 film by the late 1960s to become the most popular photographic film format...

 SLR camera
Camera
A camera is a device that records and stores images. These images may be still photographs or moving images such as videos or movies. The term camera comes from the camera obscura , an early mechanism for projecting images...

 using the Nikon
Nikon
, 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...

 F-mount
Nikon F-mount
The Nikon F-mount is a type of interchangeable lens mount developed by Nikon for its 35 mm SLR cameras. The F-mount was first introduced on the Nikon F camera in 1959, and features a three lug bayonet mount with a 44 mm throat and a flange to focal plane distance of 46.5 mm...

) under the Kenko name.

For Kenko teleconverters and lens extension rings see List of Nikon compatible lenses with integrated autofocus-motor.
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