超大哥白尼隕石坑

C.L.Chan

超大哥白尼隕石坑, 用 2x Powermate推到超過 CMOS的解像極限. Copernicus, UT 202011 26 12h24m. Telescope TECMaksutov-Cassegrain MC200/20, D=20cm, F.L.=400cm, 2x Powermate, Effective FocalLength= 8meter, Losmandy G-11 Equatorial Mount with motor drive. Camera QHY 5III224 Color Cam, Capture with FireCapture, Shoot at Gamma=100, Gain=31, Expo= 0.16ms/frame,avi format, stack and process 30% best frames in 1803 frames by free SoftwareAutoStakkert 3, wavelet with RegiStax V.6, 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.