Optical objectives with means for varying the magnification (anamorphotic objectives G02B13/08)

Child Classifications

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• G02B 15/02 by changing, adding, or subtracting a part of the objective, e.g. convertible objective
• G02B 15/14 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