In the illustration above, the limiting magnitude has been set to8.
在下面的图例中，极限星等是8——最大可能视场等级的默认星等。
In the illustration above, the limiting magnitude has been set to 9.
在上面的图例中极限星等是9等。
Atmospheric conditions and the visual acuity of the observer will often reduce limiting magnitude.
大气状况和观察者的视觉灵敏度也会降低边缘亮度。
The "limiting magnitude" of stars on the map, ie the magnitude of the faintest star which will be displayed.
星图中的极限星等，即所显示的最暗星等。
The limiting magnitude is directly related to aperture, where larger apertures allow you to see fainter stars.
边缘亮度直接与孔径相关，孔径越大，就能看到越暗的星。
For example, the limiting magnitude of an 8" aperture telescope is 14.0. (7.5 + 5 LOG 20.32 = 7.5 + (5x1.3) = 14.0).
比如，孔径为8英寸的望远镜的边缘亮度是14.0 (7.5 + 5LOG 20.32 = 7.5 + (5x1.3) = 14.0)。
To set the magnitude of the faintest star which appears on the map, change the value in the Limiting magnitude field.
要设置星图上显示的最暗恒星的星等，就在极限星等区域更改数值。
The faintest star you can see with a telescope (under excellent seeing conditions) is referred to as the limiting magnitude.
通过望远镜(观察条件相当良好)所能看到的最暗的星的等级称作边缘亮度。
It can measure the magnitude characteristic, phase characteristic and limiting frequency of a system.
它能直观的测试一个系统的幅频特性、相频特性和截止频率。
It can measure the magnitude characteristic, phase characteristic and limiting frequency of a system.
它能直观的测试一个系统的幅频特性、相频特性和截止频率。
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