軍用望遠鏡問題

其實係咩原理可以zoom到1KM遠?

Basically most rifle scope (ACOG, red dot or whatever scope) can only be able to mark target in about 400-800 yards. (Convert the number yourselve...)

圖片參考：http://upload.wikimedia.org/wikipedia/commons/thumb/0/08/PEO_Trijicon_M150_RCO.jpg/800px-PEO_Trijicon_M150_RCO.jpg

Trijison M150 ACOG

More advance rifle scope, as used in the tactical sniper rifle are using the same theory from binocular, which uses prism reflection to project target image into your eyes, as the figure shown below


圖片參考：http://upload.wikimedia.org/wikipedia/commons/thumb/f/f8/Binocularp.svg/450px-Binocularp.svg.png


you are actually not looking at the object, you are looking at the projected shadow from the object.

Zooming is just a matter of adjusting focal point, which you can bring the object nearer (Larger, Zoom-in) or further (Smaller, zoom out) from your eyepieces.

我見狙擊槍D鏡可以望到2KM遠,超越左人眼的可視距

I don't really know if a man can see 10 KM as the previous answer said, but for me, i would be lucky to be able to distingush a peas from human heads 1 km away....

Anyway, the complex lens action could project the target image closer or further as i explained before. so....

同埋想請教呢,狙擊槍的scope同spotter的望遠鏡係同步嗎?

No, basically the scope of a sniper is only scope, you can get a simple ballistic trijetory from it (with the level lines.

But the spotter scope is different, it gives data to feed back to the sniper so he can adjust his scope for its target.

Spoter scope can measure the range, the windspeed and the temperature/humidity of the location. Which of all, need to put in calculation for a sniper to mark target.

人眼基本可視10公里，視天氣狀況之影響。問題是你要求要清楚分辨人之樣貌，就因人而異，一般只有300米之內才能分辦樣貌。我不清楚你如何得出人之視界有1公里，事實視界會因距離而變得模糊，愈遠愈難分析目標。因而人類創造了望遠鏡來強化視力，其工作原理是放大；將影像放大4倍，即等如將1000米遠之人士，拉近至250米距離處觀看，這就能清楚分辨1000米遠之人士樣貌。
狙擊槍之scope都只是望遠鏡一種，附上距離測距儀，就能令槍手可計算彈道下降率，從而修正射擊角度。而spotter則是另一種工具/系統，主要作近距射擊之用，因遠距離射擊，彈道下降，距離愈遠，誤差愈大。