Object: ..... NGC7293 - The Helix Nebula - Narrowband false colours
Date: ..... 03.10.2010
Mount: ..... Losmandy G11 on Berlebach Uni-4c
Optics: ..... Skywatcher MN190, 190mm f5.3 Maksutov-Newton Telescope
Filters: ..... Baader 7nm Ha and 8nm OIII
Camera: ..... Sigma3200 with SX USB 2" Filter wheel
Chip temperature: .... -15°C regulated
Exposure: ..... Ha: 23x300s, O3: 4x600s
Binning: 2x2
Processing: ..... Stacking (Lights, Darks, Bias), Noise Reduction, DDP, colour synthesis (L-R-G-B=Ha-Ha-O3-O3) and adjustement, sharpening, all with Imagesplus 3.8
Guiding: ..... Autoguiding with modified 8x50 finder scope, Meade DSI Pro and GPUSB/PHD
Comments: medium seeing and medium transparency
101003_ngc7293_helix-nebula
132 KB1092736
