by adding a part, e.g. close-up attachment

Full Title

Optical objectives with means for varying the magnification > by changing, adding, or subtracting a part of the objective, e.g. convertible objective > by adding a part, e.g. close-up attachment

Classification Context

Section:

PHYSICS

Class:

OPTICS

Subclass:

OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

Child Classifications

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• G02B 15/12 by adding telescopic attachments