Back كارل كيلنر Arabic كارل كيلنر ARZ Carl Kellner (optiker) Danish Carl Kellner (Optiker) German کارل کلنر (عینک ساز) Persian Carl Kellner French Carl Kellner Italian カール・ケルナー Japanese Кельнер, Карл (оптик) Russian
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Carl Kellner (March 26, 1826 – May 13, 1855) was a German mechanic and self-educated mathematician who founded in 1849 an "Optical Institute" that later became the Leitz company, makers of the Leica cameras.