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Zoom lens meets magnification ratio criteria avoids field of view variation
Zoom lens meets magnification ratio criteria avoids field of view variation
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机译:变焦镜头符合放大率标准,避免视野变化
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摘要
The zoom lens has subgroups (F11,F12,F13) of negative, positive and positive lenses followed by a negative group (V) and a moving group (C) and final positive group (R) with near to far magnification ratios for the first and other groups chosen to minimize field of view variation.
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