M31 - The Andromeda Galaxy
Stellarvue SV80 f/6 Astrograph
Uploaded 11/19/21

 

            
We took this image
            under superb sky conditions - Seeing was excellent, Bortle 1
            darkness rating, and at 7000 feet elevation. This is a 2 hour
            exposure with the SV80 at about 384mm EFL at f/4.8. It has been
            years since we installed this instrument at our second high altitude
            observatory in Happy Jack. And this is the first time we have
            tried this camera out with this refractor.

            
Had frosting problems
            with this camera so had to run at 0C which is about 20 degrees
            warmer than usual. Despite this, there is good star colors and
            plenty of galaxy details to be seen.

            
Select an image size for a larger view:

1600 x 1400


Instrument:  SV80S Astrograph with Televue 0.8x FF
Mount:  Home Made GEM
Camera:  ZWO ASI071MC Pro Color CMOS
Guider: ZWO ASI120 mini  w/4" f/10 SCT guidescope
Exposure:  120m
Location:  Happy Jack, Arizona, Elevation:  7000 ft.
Sky:  Seeing FWHM = 1 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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