M41疏散星團
M41疏散星團 , 位於大犬座 . 如果說星雲是恆星的產房 , 則疏散星團就是恆星的小學 , 並且他們全都是兄弟姊妹 .Open Cluster M41, 2018/03/21, HKT 22h30m to40m , Telescope: Astro Physics, Star 12 ED, D=12cm, F.L.=102cm, Prime Focus with flat field lens and Astronomik light pollution filter, Losmandy G-11 Equatorial Mount with motor drive. Manual object targeting. Canon EOS 700D Camera , IR Low pass filter removed. ISO1600,30 sec exposure per frame. CRW Format. Custom white balance frame. Light frames 20x, Dark frames 17x, Bias frames 10x, Flat frames 12x, Stacked by Deep Sky Stacker free software. Post processing by GIMP & Microsoft Photo software. 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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