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PCE
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CPC Subgroup
G02B 15/24

having a front fixed lens or lens group and two movable lenses or lens groups in front of a fixed lens or lens group

Full Title

Optical objectives with means for varying the magnification (anamorphotic objectives G02B13/08) > by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective > with movable lens means specially adapted for focusing at close distances > having a front fixed lens or lens group and two movable lenses or lens groups in front of a fixed lens or lens group

2 direct subcodes

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