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Sunday, January 1, 2017

Bright nebulae of the central Cygnus, a seven panel mosaic

My last photo for the year 2016 is a seven panel mosaic of the central Cygnus. I shot last panels for this mosaic at 30.12. 2016. 

Bright nebulae of the central Cygnus
Please, click for a large image, 1800 x 1400 pixels

The photo is in mapped colors from the light emitted by an ionized elements, 
red=sulfur, green=hydrogen and blue=oxygen. A mosaic image with seven panels. Original image has a resolution of 12.000 x 9000 pixels. Image spans about three degrees of sky horizontally.


Please, click for a large image

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. Part of the color data is taken from this wide field photo.

Technical details

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.

Imaging optics
Celestron Edge HD 1100 @ f7 with 0,7 focal reducer for Edge HD 1100 telescope
Canon EF 200mm f1.8 camera optics (For S-II and O-III channels)
10-micron 1000
Meade LX200 GPS 12" (For S-II and O-III channels)

Cameras and filters
Imaging camera Apogee Alta U16 and Apogee seven slot filter wheel
Guider camera, Lodestar x2 and SXV-AOL
QHY9 (For S-II and O-III channels)

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, 27 x 1200 s binned 2x2 
O-III, 18 x 1200 s binned 4x4 = 
S-II,  18 x 1200 s binned 4x4 

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