M5 in Serpens
with 10" f/3.9 Astrograph
Uploaded 5/30/23

 
This
            is the latest shot with the 10 inch and Atik 16200 CCD camera.
            It has been very challenging to get the plane of the large format
            CCD to align with the focal plane. However, this was fixed by
            both adjusting the tilt of the focuser and recentering the diagonal
            support in the tube. It is hard to find a suitable target for
            a wide field astrograph in the spring. All is tiny galaxies!
            Here is the one exception, a large and very rich globular cluster.
            Still, this image is cropped to 75% size to bring its size up
            a bit, and yet still maintain a larger field than what I had
            for decades with the ST10xme CCD.

            
Select an image size for a larger view:

1400 x 1290


Instrument:  10" f/3.9 Orion Astrograph Newtonian with Baader MPCC
Mount:  Astrophysics 1200 QMD
CCD Camera:  ATIK 16200 
Guider: ASI120  w/80mm WO Zenithstar 81 piggyback refractor
Exposure:  L= 60m, RGB = 60m = total of 2h
Astronomik  RGB Combine Ratio:  1: .9: 1.5
Location:  Payson, Arizona, Elevation:  5150 ft.
Sky:  Seeing FWHM = 3 arcsec , Transparency 9/10
Outside Temperature:  55 F
CCD Temperature:  -30 C
Image Processing Tools: 
Maxim DL6:  Calibration, PixInsight:  All Remaining processing, Production finishing: Photoshop CS2

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