AMATEUR ASTRONOMY PAGES
Javier Gómez Laina                                                
                                                                  ngc7789  in  Cassiopeia
           (click on image for a larger size)



Object:             ngc7789, open cluster
Optics:             Home made 250 f/5.4 carbon-fiber tube Newton. TV Paracorr & IDAS LPS filter.
Camera:           Canon 350d  modified (infrared filter removing)
Exposures:       18 x 180"  ;   54' total exposure
ISO:                 800
Date:                9 Nov 2005
Mount:              Home made aluminium fork controled by Mel Bartel's design system.
Guiding:           MX716 on
2x barlowed TV-76

 

Processing:

ImagesPlus:
Darks, Bias & Flat calibration; average combining.
Digital Development Processing (DDP).

Registar:
images aligning

PixInSight:
Dynamic Background Extraction (sky gradient correction)
Substractive Chromatic Noise Reduction (SCNR) on green channel

PhotoShop:
Curves  adjust.
Color balance.

LRGB combining (grayscale image as luminance)

AstroArt:
Smart Star Bloat Deconvolution on luminance channel