FIELD: physics, photography.
SUBSTANCE: system for providing a two-position zoom-focus capability in a video inspection device comprises, in one embodiment, a focus lens cell and primary aperture attached to a set of fixed guides and connected to a zoom lens cell. The focus lens cell can move into a first position along said guides through activation of an external lens movement mechanism, and can move into a second position through relaxation of a tensioned focus spring. Movement of the focus lens cell between first and second focus positions causes movement of the zoom lens cell and a secondary aperture between first and second zoom and aperture positions, respectively.
EFFECT: obtaining magnified and unmagnified images of a target object in extreme devices.
19 cl, 5 dwg
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