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.[1][2] 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.
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