20171021 M31

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 PSM31_240x15_iso1600_STF_DBE_BGN_PS45x30