Point the camera at a white background, and observe this phenomenon with a magnifying glass.
将相机对准白色背景,然后用放大镜观察这种现象。
Take your camera and a tripod away from the city, under some darker skies and point the camera up.
远离尘嚣,带上你的相机和三脚架,在深邃的夜空下将镜头对准无垠天际。
This is a little easier if you have an SLR camera, but it can also be done with a point and shoot if you can manually adjust your exposure.
如果你有个单反相机那最好,如果没有,那么能够手动调节曝光的傻瓜数码相机也行。
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