Rosette nebula, NGC 2244 : color + H-alpha

Click on above image for hires.

Technical Data - H-ALPHA
Optics Schmidt camera 400/300/615 (Zen optics)
Focal Lenght 615 mm
Focal Ratio f/2,0
Exposure Time Total 3h50min (23x10 min)
Sensor Kaf-6303
Filters H-alpha 6nm Astronomik, selected for f/2
Chip temperature
Location Tradate (VA, in Pianura Padana, Italy) at 300m height
Date and time of exposure start 2 nights, 17 and 18 February 2009
Mount Astrosystems Fork
Tracking Webcam Vesta Pro B/W on Pentax 75 refractor
Temperature and humidity T=0 °C, RH=80 %
Sky brightness at zenith (with SQM-L)18.5 - 19.0 mag/arcsec^2
Notes -

Technical Data - COLOR
Optics Pentax 75
Focal Lenght 500mm
Focal Ratio f/6.7
Exposure Time 3h20min (20x10 min)
CCD Canon EOS 5D with baader filter
Location Cosola (PC, Italian Appennines) at 1150 m height
21 February 2009
Mount Gemini G-41
Tracking ST4 on a 80mm f/5 refractor
Temperature and humidity T=-3 °C, RH=50%
Sky brightness at zenith (with SQM-L) 21.2 mag/arcsec^2
Notes -

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