NGC 7023 Iris Nebula

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Technical Data
Optics Newton 200 mm (homemade by L. Comolli, F. Riccio and P. Battaglia)
Focal Lenght 1260 mm
Focal Ratio f/6
Corrector Baader MPCC
Exposure Time 2h (single exp of 10 min)
CCD Canon EOS 5D with baader filter
Sensitivity 800 ISO
Location Bogli (PC, Italian Appennines) at 1350 m height
27 and 28 May 2011
Mount Gemini G-41
Tracking Lodestar on an 80mm f/5 refractor
Temperature and humidity T= +6°C, RH=70%
Sky brightness at zenith (with SQM-L) 21.3 mag/arcsec^2
Notes Bad seeing, sky cleared after a thunderstorm. Veils and electronics problems ruined part of the two nights. Moreover I got guiding problems (now solved), so the total exposure is limited even if I invested two nights.

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