深空、觀測記錄 20171021 M31 2017-10-21 admin M31 240s * 15 自由追蹤 iso1600 w/darks*9 flats*10 Takahashi FC-60nz w/76D Flatterner. Takahashi P2z on Lu_Carbon Tripod w/PoleMaster. Canon 5D2(mod) w/STCamf inner crops to 4500*3000 pixels. PI STF_DBE_BGN PS