M81 Group

18:39 22/9/2006 UTC

My another image with my own equipment from DS-Meet. This was quite successful except I didn't take care of the nearby mast and its bright red light. M81 Group got close to the mast had ugly red glow in several images. Finally the objective got dewed and I had to end my session and move to visual observations for the rest of the night. Sigma Clipping made the glow disappear almost totally.

Camera: Modified Canon EOS 350D | Telescope: Skywatcher ED80 Pro 80mm f7.5 refractor, William Optics 0.8x focal reducer | Mount: Orion Skyview Pro, Boxdoerfer PowerFlex MTS-3SLP drive controller | Filters: Baader IR/UV block | Guiding: , Orion ShortTube 80mm f5 refractor, QCGuider, Teleskop-Service 1.5x Barlow, Phillips ToUCam Pro II webcam | Exposure: 12x240s (48m) ISO800 f6, 4 darks, 15 flats, bias | Software: IRIS, GIMP | Location: 60°44'00"N 26°12'46"E (Tähtikallion Observatory/Artjärvi, FI)