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各位比d意見

mhs

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1# A A A Post at 9/06/2009 16:41  Show all
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單筒最大的優點是焦長 , 10x 目鏡 * DC本身 4X 光學 = 80X 約等於 1400mm , 用 DSLR 沒那麼長的焦長
請問Papago
以Nikon P6000來計算4倍zoom, 30x目鏡相等於多少mm呢?  謝謝.

MHS

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mhs

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2# A A A Post at 10/06/2009 10:18  Show all
昨晚再爬文有两篇文章出自Swarovski和Nikon,都講了如何計算焦距,下面連結供参考.

http://www.nikon.com/products/sportoptics/how_to/digisco2/index.htm

http://www.sw-optik.com.cn/index.php?read-15.html

以Nikon P6000, 30x作例
1.) SW的計算方法:
    P6000的鏡片焦距6-24mm,換算135格式焦距=28-112mm. 28/6=4.67, 即是
     最短6x30x4.67=840.6mm
    最長24x30x4.67=3362.4mm

2.) Nikon的計算方法:
    28x30=840mm
    112x30=3360mm

兩者都基本相同,papago兄和Dick兄計算出來亦基本相同.

明白晒,謝謝兩位.以後要多請教啦.


再有一問題:單筒應買直筒還是曲筒呢?直筒在鳥屋方便而曲筒則平時方便,真難决定.

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mhs

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3# A A A Post at 10/06/2009 14:47  Show all
謝謝Papago

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