| 摘要 |
A webcam with an optical lens that can manually be moved into a position in front of the camera lens. The lens may slide or be rotated to a position in front of the camera lens. The optical lens may be a zoom lens, such that, in combination with the lens of the camera, a fixed zoom or magnification function is provided. Alternately, at least a second lens may also be provided, such as to provide two fixed zoom positions. The two lenses could be moved together with a single mechanical structure, or separately with two different manual controls.
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