... 目镜测微计 ocular micrometer; 目镜放大率 magnification of eyepiece; 目镜筒 eyepiece slide; ...
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When viewing extended objects, the apparent brightness seen in the eyepiece is a function only of aperture and magnification, it is not related to focal ratio.
当观察扩展光源时，目镜中所看到的亮度只跟孔径和放大率有关，它跟焦比并没有关系。
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