I just had a crash course on binocular

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送交者: 008 于 2013-05-09, 11:27:19:

回答: 望远镜讲究真多啊。我这里介绍一下我的初步认识。 由 bluesea 于 2013-05-09, 03:55:24:

- 7x50, 7 means magnification, 50 is the diameter of the objective

- coated, multi-coated, full coated, full multi-coated refers to the AR coating

- BK7 or Bak-r refers to the type of glass

- roof or Porro refers to the prism

That's pretty much all.



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