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Zoom lens, still image camera comprising the zoom lens, and video camera comprising the zoom lens
Zoom lens, still image camera comprising the zoom lens, and video camera comprising the zoom lens
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机译:变焦镜头,包括该变焦镜头的静止图像照相机以及包括该变焦镜头的摄像机
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摘要
Provided from the object side are a first lens group (11) having a positive refracting power and fixed to the image plane, a second lens group (12) having a negative refracting power and a magnification varying action exhibited when moving along the optical axis, a third lens group (13) fixed to the image plane and having a positive refracting power, and a fourth lens group (14) movable along the optical axis so as to maintain the image plane moving with the movements of the second lens group (12) and of the object in a fixed position from a reference plane. Hence the movement of the image due to camera shake is corrected by moving the whole third lens group (13) vertically to the optical axis. The size is reduced and the aberrations are small because the whole groups whose optical performance is united are decentered.
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