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F-number drift zoom lens
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F-number drift zoom lens
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艺术学
镜头参数
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F-number drift zoom lens
F数漂移式变焦距镜头
当摄影镜头焦距f'改变时,该摄影镜头的入瞳直径Dλ虽也跟着产生改变,但变化的倍率小于焦距f'的改变,即f'与Dλ二者的比值在变焦中改变了,从而使该摄影镜头的F数在变焦的全过程中产生变化的变焦距摄影镜头。
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proper coloring
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proper component
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proper congruence
proper conic
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proper convex body
proper convex cone
proper convex function
proper convex set
proper cover
proper cutset
proper cycle
proper differentiability
proper differentiable mapping
proper direction
proper disconnection group
proper distance
proper distribution
proper divergence
proper divisor
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