Paul Walker
Registered: November 2009
Location: Middlebury, Vermont
Posts: 116
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NGC6888 (The Cresent Nebula)
2009-12-22
Middlebury, VT
Constellation - Cygnus
Exp 10x8min (80 min total)
ISO 1600
North - up
10 inch f/5.6 (1407mm fl) Newtonian (Homemade with Coulter Optics)
Field of view: 0.90 x 0.60 deg.
Large Wooden Split Ring Equatorial Mount
Camera - Modified Canon Rebel XT (350D) (8 mega pixel) (modified by Hap Griffin)
with Orion Broadband Light Pollution Filter
with Baader Coma Corrector (MPCC)
Temperature - 19 degree F
Transparency 20.1 mag/arc sec, At zenith 20.4 (Sky Quality Meter)
Seeing 4 (1-10)
Autoguider (Meade Pictor 201XT)
Stacking - Registax 5
Noise Reduction - Noise Ninja 2
Other - Picture Window Pro 5
Stacked images with darks and flats. Saved as 16 bit FIT (separate Red, Green and Blue files). Did noise reduction on Red, histogram strecth on Red, Green and Blue images, unsharpmask on R, did 2nd hist stretch on R, G + B, then combined R, G + B images.
Cresent Neb_2009-12-06_10x8min_iso1600_10in f5_R_NRr1-unshp-r2-G1G2-B1b2-Medium.jpg
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