Such telescopes are called reflectors, and they offer major advantages over refractors, which use two lenses and suffer from optical distortion effects.
这种类型的望远镜称为反射望远镜，比折射望远镜更具有优势，后者需要用到两个透镜，而且会受到光学畸变效应的影响。
Such telescopes are called reflectors, and they offer major advantages over refractors, which use two lenses and suffer from optical distortion effects.
这种类型的望远镜称为反射望远镜，比折射望远镜更具有优势，后者需要用到两个透镜，而且会受到光学畸变效应的影响。
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