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All the material on this website is copyrighted to J-P Metsavainio, if not otherwise stated. Any content on this website may not be reproduced without the author’s permission.
Wednesday, January 4, 2017
A three panel mosaic in visual palette, combined from narrowband channels, shows a three degrees patch of the central Cygnus gas formations. I have published a mapped color version few days ago, it can be seen HERE.
The Sky on Fire
Please, click for a large image, ~2200 x 1030 pixels
Image is in Natural colour palette from the emission of ionized elements, R=Hydrogen + Sulphur, G=Oxygen and B=Oxygen + 10% Hydrogen to compensate the missing H-beta emission..
Orientation in Cygnus
Please, click for a full size photo
An older wide field photo with the Canon EF 200mm f1.8 camera lens and Baader narrowband filters. Area of interest is marked as a white rectangle.
Processing work flow
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 21 iterations, added at 25% weight
Color combine in PS CS3
Levels and curves in PS CS3.
Celestron Edge HD 1100 @ f7 with 0,7 focal reducer for Edge HD 1100 telescope
Cameras and filters
Imaging camera Apogee Alta U16 and Apogee seven slot filter wheel
Guider camera, Lodestar x2 and SXV-AOL
Astrodon filter, 5 nm H-alpha
Baader filter, 8,5 nm O-III
Baader filter, 8 nm S-II
Exposure times for all seven panels
H-alpha, 21 x 1200 s binned 2x2
O-III, 18 x 1200 s binned 4x4
S-II, 18 x 1200 s binned 4x4