Observation eyepiece consists of concave mirror and a separate gate is formed, in the eyepiece can be seen at the same time the two semicircle color, its left for the sample color.
2
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。
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.
3
使用者通过目镜观察，并使用手机上的按键移动屏幕上的两条直线，直到它们重叠到一起。
The user looks into the eyepiece and uses the buttons on the phone to move two lines until they appear as one.
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