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IC 5146 – Cocoon Nebula
Date /time: 17.10.2008 18:33 to 17.10.2008 19:44 18.10.2008 18:18 to 18.10.2008 19:32 Ambient conditions: 0°C, transparency 3/5, seeing 3/5, rising ¾ Moon, high clouds Location: Trier, Germany Equipment: Telescope: C 8 with Alan Gee and JMI motor focuser Mount: CGE, selfguided with ST-4000XCM Camera: SBIG ST-4000XCM Acquisition: Software: CCDSoft V5 FOV, Image scale: 34.5 x 35.2 arcmin, 1.21 arcs/pixel Sub-exposures: 80min (12 x 5min + 7 x 10min) lights at –30°C 27 x 5min + 16 x 10min dark frames 16 x 0.1s t-shirt light-box flats at –20°C 50 bias at –20°C for flats calibration Processing: Flats normalized in CCDSoft, calibration and stacking in Images Plus 3.0, Stretch, curves and levels adjustments, noise reduction and final sharpening in CS3. Comments: Strong vigneting and light pollution. Flats did not match exactly the light frames. Considerable Image processing to minimize gradients and achieve an acceptable image quality.
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Ciao Admilson,
come stai ???? Tutto bene ?
Finite le vacanze ?
Per me qui a Lainate (MI) tutto è tornato nella normalità fatto salvo la consueta ultima uscita stagionale per lo star-party della Valle D'Aosta dove sono riuscito a fare solo una "mezza" immagine (vedi mio blog ) causa meteo non proprio buono.
Tu piuttosto hai fatto altre riprese? Usi sempre il Deltagraph?
Ciao
Giovanni