|
彗星 46P經過七姊妹星團的天區 , 因有城市煙霾 , 散射了半個上弦月的光 , 月明星稀使星光暗淡 , 不能用較長時間的曝光 .
Comet 46P/ Wirtanen & M45 Pleiades OpenCluster, 2018 12 18 HKT 01:36 to 01:48 Canon 700D Camera, IR filter removed.Canon EF 55-200 set at 100 mm, f/ 5.6, ISO 3200, Exposure 10 sec each. RAW formatis using. Use Deep Sky Stacker software to stack 46 light frames, 10 Darkframes, 10 Bias frames and 10 Flat frames. Color curve, brightness &contrast adjustment by GIMP. Total exposure is 7.6 minutes. Atmospheric Transparent :5/10, Seeing :7/10. Place where the photos taken is Kennedy Town, Hong Kong.
| 
發表於 2018-12-18 12:19:13