要使曝光区温度达到扩散实验要求，必须使曝光区功率密度很高。
Because temperature rise of the exposed region must meet the requirement of diffusion experiment, high power density of the incident laser beam is necessary.
而长时间曝光也拍出了红色发射星云、恒星形成区ic 405、IC 410和IC 417。
But the deep exposure also brings out the reddish emission nebulae of star-forming regions IC 405, IC 410, and IC 417.
如果你所预测的本垒附近的动作场面是处在阳光照耀下，你可以预先设定好对明亮的本垒区的曝光参数。
If you anticipate the action at home plate which is in bright sun, you can set your exposure for the bright home-plate area in advance.
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