M 27 - The Dumbell Nebula Date/time: 06.08.2010 22:35 to 07.08.2010 00:20 Az./Alt. positions: 154° / 68° to 182° / 69° Ambient conditions: 20°C, transparency 5/5, seeing 4/5 Location: Villa Tatti, Tuscany, Italy Equipment: Telescope: Deltagraph 300mm f/3.3 Mount: CGE Camera: SXVF-M25C Guiding scope: Orion short tube 80mm f/5 Guiding camera: ATIK 16IC Filters: IDAS LPS Acquisition: Software: Maxim DL 5 FOV, Image scale: 62.5 x 54.8 arcmin, 1.62 arcs/pixel Sub-exposures: 25 min (5 x 5min) light frames No darks, 100 bias, 50x0.2s flats Processing: Images Plus 3.75: Calibration of light frames with bias and flats, DDP Maxim DL: Stacking of calibrated frames with SDMask, color balance R85:G100:B120 CS3: Levels, Carbonis Actions, Match Color Comments: This was the first test object during my stay at Villa Tatti. The use of IDAS LPS filter increased significantly the contrast and reduced the reddish background, even if we were in a dark site. Only 25minutes yielded anyhow a fine picture. Drawback is the limitations of the CGE mount, so at very high magnification we can see oval stars.
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