AMATEUR ASTRONOMY PAGES
Javier Gómez Laina                                                
                                                   ngc7331  &  Stephan's Quintet  in  Pegasus
           (click on image for a larger size)



Object:             ngc7331, Stephan's Quintet and several small galaxies
Optics:             Home made 250 f/5.4 carbon-fiber tube Newton. TV Paracorr & IDAS LPS filter.
Camera:           Canon 350d  modified (infrared filter removing)
Exposures:       55 x 300"  ;   4h:35' total exposure
ISO:                 800
Date:                5 Oct 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.
Digital Development Processing (DDP).

Registar:
images aligning

MaximDL:
SD Mask images combining.

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

PhotoShop:
Curves  adjust.
LRGB combining (grayscale image as luminance)

CCDSharp:
Lucy-Richardson Deconvolution on luminance channel