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楼主 |
发表于 2012-8-27 05:17 PM
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天地 发表于 2012-8-27 03:42 PM
Celestron SkyMaster Giant 15x70 Binoculars with Tripod Adapter
那,这个不是70倍 而是15x, 70mm obj ...
你是对的,应该是 15X70 MM,这里的倍数和长焦不是一个概念。后面的视镜越大,POWER越大。
The 15x refers to the magnification power of the lens combination, the 70 is the Field [or angle] of View.
Generally the higher the power of any optical device, the narrower the angle of view.
Generally the higher the power of any optical device, the narrower the angle of view.
通常 7x50 以上就是高倍的了。 |
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