Monday, January 9, 2017
Bright nebulae of the central Cygnus, eleven panel mosaic finalized
My first photo session for the year 2017 was at January fourth. As a result, I was able to finalize my mosaic image of the central Cygnus. It has now eleven panels stitched together seamlessly. I have made two versions, as usually. This one is in mapped colors and another, yet unpublished, in visual spectrum.
Mosaic images can be highly work intensive but the final resolution is great. They are very suitable for extreme large prints. Original resolution is around 20.000 x 9000 pixels.
Please, click for a large image, 2100 x 1000 pixels
red=sulphur, green=hydrogen and blue=oxygen. A mosaic image with seven panels. Original image has a resolution of about 20.000 x 9000 pixels. Image spans about five degrees of sky horizontally.
Sub images taken for the mosaic in chronological orderPlease, click for a large images
Three panels, January 7. 2016
One panel, December 27 2016
Four panels combined, December 27 2016
Five panels, January 1. 2017
Eight panels, January 1. 2017
The final four panels, January 4. 2017
Orientation
Please, click for a large image
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)
Mount
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)
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, 39 x 1200 s binned 2x2
O-III, 22 x 1200 s binned 4x4 =
S-II, 22 x 1200 s binned 4x4 =
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