Powered zoom device having constant focal length changing rate
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机译:具有恒定焦距变化率的电动变焦装置
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摘要
A powered zoom device for camera including a lens having a variable magnification lens group adapted to be changed in focal length in response to displacement thereof in a direction along the optical axis, comprises lens-moving means for driving said magnification lens group, and control means for driving said lens-moving means so as to move the magnification lens group with the constant changing rate of the focal length. IMAGE
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