望遠鏡的有效焦距增至 10公尺, 拍了柏拉圖平底坑
吳先生上月借了一個 2.5x 增焦距鏡給我, 使望遠鏡的有效焦距增至10公尺, 拍了柏拉圖平底坑, 須然風急影像跳,借助疊相軟件, 可以看到平底坑中有多個小隕石坑, 你數到多少個?Plato Circular Basin. UT 2021 11 15,13h06m, Telescope TEC Maksutov-Cassegrain MC200/20, D=20cm, Tele Vue 2,5xBarlow lens, Total Focal Length=1000cm, Losmandy G-11 Equatorial Mount withmotor drive. Camera QHY 5III 224 Color Cam, Capture with FireCapture, Shoot at Gamma=100,Gain=30, Expo= 3.8 ms/frame, avi format, stack, and process 25% best frames in 1793frames by free Software AutoStakkert 3, wavelet with RegiStax V.6, iL=2, L1=38,L2=12.Final touch by Microsoft Photosoftware. Atmospheric condition: Transparent: 8/10, Seeing : 8/10. Equipmentborrowed from Mr. Ng. The photo was taken at Kennedy Town 堅尼地城,Hong Kong.
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