2005/09/30 | 折射望远镜[Refracting Telescope]
类别(¤〖天文〗) | 评论(0) | 阅读(16) | 发表于 23:26
Refracting telescopes (called "refractors") were invented in 1609. They suffer from chromatic aberration and are no longer in widespread use at research observatories. However, as a result of their superiority to reflectors for visual planetary observation because of slower f-ratios and better optics, the amateur community uses refractors extensively.
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