Astrophotography by Keith B. Quattrocchi

                                        NGC 7635
                        Emission Nebula in Cassiopeia
                       Composite NB-LRGB Image

                        Copyright 2013
                      Keith B Quattrocchi


                                      Image Acquisition Information                      
                               Telescope:   16" RCOS Richey Chretien Telescope (ion milled at 6/9) 
                               Camera:       SBIG STL-11000
                               Guiding:       SBIG 402
                               Filters:        Astrodon Ha, SII OIII and Astrodon LRBG Filters
                               Mount:        Software Bisque Paramount ME
                               Acquisition Programs:   The Sky,CCDAutopliot IV, CCD Soft. 
                               Processing ProgramsCCDStack, Maxim DL, Photoshop
                               Date: Data processed August 16, 2013.  Data aquisition: August 5, 2013-                               August 15, 2013                              
                               Time: 14 x30 min ( 7 hours) for each of Ha, SII, OIII, L, R, G and B
                               Total of  49 hours imaging time.                              
                               Processing:  CCD Stack and PhotoShop CS/4
Image Infornmation:  M81 NGC 7635 is an emission nebula in Cassiopeia. 
Processing Infornmation  This Composite Narrow Band and LRGB image was obtained using  AstroDon NB and LRGB filters.  The NB and LRGB images were assembled in CCDStack.  The NB and LRGB images were then compined in Photoshop.  Further stretching, high pass filtering and background smoothing was performed with Adobe Photoshop CS/4.  All data stretching was by minimal stretching with gamma and DDP in CCD Stack and then further stretching with curves/levels in photoshop.   

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