NGC 3718 / NGC 3729 galaxies in Ursa Major
 
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Telescope: Officina Stellare RC Pro 12,5" with focal reductor f/6.7, 2134 mm
CCD Camera: SBIG STL-6303
Mount: German equatorial mount Astro-Physics 1200 GTO
Integration: RRGB 360:40:40:40
Date / Location / Sky: 22,23,24, 26 May 2009 Luminance: Tuscany, Mt. Amiata. Color: Sicily, Nebrodi Mounts.
FWHM: 1.8" Sky luminosity: 21.4 mag. per squared arcsec
Software: MaxIm-DL, Registar, PhotoShop