Hercules 於 2003 年 6 月 1 日 上載
Fotographie von Infrared vier
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Intrarot Filter
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Hercules @2003-06-02 21:42:03http://www.wrotniak.net/photo/infrared/
Near infrared light consists of light just beyond visible red light (wavelengths greater than 780nm). The filter only allow near Infrared to enter the lens, the filter have 10 to 30 times filter factor, need 1 to few second to have enough exposure. -
sahara @2003-06-02 01:43:59^_^ -
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