Kenko (company)

Kenko Co., Ltd. (株式会社ケンコー, Kabushiki-gaisha Kenkō) is a Japanese manufacturer and trading company of photographic accessories, especially known for its teleconverters and filters. Located in Tokyo, they have been producing conversion lenses since the 1960s. They produce camera lenses under the Tokina brand name. They also manufacture a beginner's 35 mm SLR camera (using the Nikon F-mount) under the Kenko name.