三兄弟

C.L.Chan

左邊的平地是一個未名灣, 右邊的是三兄弟, 大哥是地心說的專家托勒密 Crater Plolemaeus,  阿耳豐斯 Crater Alphonsus &阿爾扎赫 Crater Arzachel,UT 2020/10/26: 12h28m, Telescope TECMaksutov-Cassegrain MC200/20, D=20cm, F.L.=400cm, Losmandy G-11 EquatorialMount with motor drive. Camera QHY 5III 224 Color Cam,  Shoot by FireCapture at Gamma=100, Gain=38,Expo= 0.3ms/frame, frame rate=20 frames/sec, RGB & avi format, stack andprocess 25% best frames in 1803 frames,­ with Software AstroStackert 3 withDSR, wavelet with RegiStax V.6,  finaltouch by Microsoft photo. Atmospheric condition: Transparent: 9­/10, Seeing:6/10, Equipment borrowed from Mr. Ng. The photo was taken at Kennedy Town堅尼地城, Hong Kong.