多雲氣及有立體感的 M42
獵戶座 M42 大星雲 , 這次拍攝目的是在市區加長爆光時間, 合共15分鐘 . 並用了 Ben Law & Lawrence Mok位同好教導的拍攝平場的方法 . 得到的效果超出原先想像 , 看到更多雲氣及有立體感 .Orion M42 Nebula, 2018/01/16, HKT 22h19 to393m , Telescope: Astro Physics, Star 12 ED, D=12cm, F.L.=102cm, Prime Focus, Losmandy G-11 Equatorial Mount with motor drive. Manual object targeting. Canon EOS 700D Camera , IR Low pass filter removed. ISO800, 60 sec exposure. CRW Format. Light frames 15x, Dark frames 10x, Bias frames 10x ,flat frames 10x. Stacking by Deep Sky Stacker freeware and processed by Microsoft photo . Atmospheric Transparent :7/10, Seeing :7/10. Equipment borrowed from Mr. Ng. Taken at Kennedy Town, 堅尼地城Hong Kong .
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