Estimados amigos:
I attach an astrophoto de M 101 ,
filters: Luminancia-Red-Green-Blue
Corbera de Llobregat .Observatory Can Margarit.
Date:17-05-2011 23 HL.
Telescope: Astrógraph Orion Optics UK AG-10 f:3.8
Mount: 10 MICRON GM 2000 .
CCD: Apogee alta F 8300 temperature chip -30
Luminancia: 11 x 600 sec bin1
Red: 4 x 600 sec bin1
Green:4 x 600 sec bin1
Blue: 4x600 sec bin1
Calibrated with darks-flats- .:
Programs
CCDStack2+Photoshop CS6.
Best Regards.
Jose Ramon Mundo