The  North American Nebula in Cygnus
with 8" f/3.9 Astrograph
Uploaded 10/19/20

 
This
            shot demonstrates the field size of the camera on the fast 8
            inch f/3.9 astrograph. A Baader MPCC coma corrector was used
            yeilding sharp stars to the corners. About 2 degrees wide, this
            field will be perfect for so many intermediate sized nebula.
            This is a "White Light" shot, no filters other than
            the usual RGB over the color sensor was used.

            
Select an image size for a larger view:

1400 x 1290


Instrument:  8" f/3.9 Orion Astrograph Newtonian with Baader MPCC
Mount:  Astrophysics 1200 QMD
Camera:  ZWO ASI071MC Pro Color CMOS
Guider: Meade DSI Pro  w/80mm piggyback refractor
Exposure:  35m
Location:  Happy Jack, Arizona, Elevation:  6900 ft.
Sky:  Seeing FWHM = 3 arcsec , Transparency 9/10
Outside Temperature:  45 F

Image Processing Tools: 
Maxim DL6:  Calibration, Color Conversion, aligning, stacking
PixInsight:  Saturation Curves
Photoshop CS2:  Curves, Color Correction, Gradient removal (Grad Xterminator), Cleanup

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