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
