望远镜[Telescope] - 达人(其实～我是卧底，来自外星)

2005/10/04 | 望远镜[Telescope]
类别(¤〖天文〗) | 评论(0) | 阅读(20) | 发表于 10:07: Reflecting telescopes (called "reflectors") come in five main configurations: prime focus, Newtonian, Cassegrain, Coudé, and Schmidt camera. The Ritchey-Chrétien design is also used.

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.; 0