by changing, adding, or subtracting a part of the objective, e.g. convertible objective

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

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

CPC:

Optical objectives with means for varying the magnification (anamorphotic objectives G02B13/08) > by changing, adding, or subtracting a part of the objective, e.g. convertible objective

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

Child Classifications

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G02B 15/04 by changing a part IPC+CPC Available in IPC and CPC
G02B 15/10 by adding a part, e.g. close-up attachment IPC+CPC Available in IPC and CPC