Reprocessing of my previous image : http://www.astrobin.com/197975/

The field is 8x5.21 deg.
Included DSOs : NGC6888 (Crescent Nebula), M29, NGC6910, NGC6914, IC1311.
Two nights of acquisition in center France during my holidays. It's the first time a make such a mosaic and it was very hard for me to process all the images. There is still a lot of noise due to the small amount of images.

Capture :
July 19, 2015 : Ha
July 20, 2015 : RGB
Auvergne, France

Setup :

Acquisition :
William optics Zenithstar 66
William optics Flatener 6
Moravian G2-8300
Astrodon 5nm Ha filter
Astrodon TruBalance R,G,B filters.

Guiding :
Skywatcher 8x50 Finderscope
QHY5LII-C camera

Mount :
Skywatcher AZ-EQ6 GT
Acquisition :
Ha : 7 x 5mn bin 1x1 for each panel (Total = 56 x 5mn).
R,G,B : 4 x 3mn bin 2x2. for each panel (Total = 96 x 3mn).
100 Bias bin 1x1, bin 2x2 (Superbias)
50 darks bin 1x1, bin 2x2
25 flats for each channel

Softwares:
Acquisition : Sequence Generator Pro
Guiding : PHD2
(pre)Processing : PixInsight 1.8
Mosaic and cosmetic : Photoshop CS6

Processing :
Preprocessing as usual, done manually (without BatchPreprocessing).
R,G,B of each panel has been aligned on the Ha channel using 2D-Spline and disortion correction.
A HaRGB image has been made for each panel using the NBRGB script.
The mosaic has been done with Photomerge (PS CS6)
The mosaic has been processed with PixInsight 1.8