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Helicoid structure used to drive a lens barrel in a vari-focal a

Photography – Having variable focal length of camera objective
Patent

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Helicoid-structure

Photography – Having variable focal length of camera objective
Patent

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High variable-power ratio, high aperture ratio, zoom optical sys

Photography – Having variable focal length of camera objective – Having focus operation
Patent

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Hybrid camera including viewfinder with masks for parallax corre

Photography – Having variable focal length of camera objective – Having focus operation
Patent

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Hybrid electronic-film camera

Photography – Having variable focal length of camera objective – Automatic change of focal length
Patent

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