Chromatic Aberration — usually associated with objective lenses of refractor telescopes, is the failure of a lens to bring light of different wavelengths (colors) to a common focus.
色差-经常在折射望远镜的物镜上出现，是因为透镜不能把不同波长(颜色)的光聚焦到一点而形成的。
There are two types: the "obstacle array" and the "path length refractor."
主要有两种类型：障碍型和等长折射型。
You have to wonder if the designers have ever actually been near a working refractor...
你会好奇这个设计者是否真的靠近过一个可以工作的折射镜。
I remember as a child seeing them through my small backyard refractor and it was unmistakable.
我记得小时候用我的小折射镜看它们，是如此的明显。
He began examining nearby galaxies with a 10-inch refractor to see whether any stars had flared up.
他用口径10英寸的折射望远镜巡视邻近的星系，查看是否有恒星已经闪亮。
He began examining nearby galaxies with a 10-inch refractor to see whether any stars had flared up.
他用口径10英寸的折射望远镜巡视邻近的星系，查看是否有恒星已经闪亮。
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