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COMPACT WIDE-ANGLE CLOSE-FOCUS ZOOM LENS FOR SINGLE LENS REFLEX CAMERA
COMPACT WIDE-ANGLE CLOSE-FOCUS ZOOM LENS FOR SINGLE LENS REFLEX CAMERA
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机译:用于单镜头反光相机的紧凑型广角近焦变焦镜头
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摘要
A wide-angle close-focus zoom lens for a single lens reflex camera, said lens having no more than a total of three independent movable lens element units or sub-units. The lens can have as few as eight lens elements without requiring any aspheric lens element surfaces.
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