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發表於 2008-12-23 09:12:08
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>我想問一般用黎觀星的望遠鏡焦距係幾多?
Depends on what you want to look at, usually longer than 1,000 mm.
>另外,如果玩開攝影的,拎支500mm以上的鏡可以等於天文望遠鏡嗎?
I am afraid that it is not that simple. Unless you are using very short exposure and shooting very bright objects like the Moon, you will need a equatorial mount to track the star's motion. |
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