The Sword of Orion
Explore Scientific AR152 Refractor

 
 The
            six inch f/6.5 refractor was bought specifically for narrow band
            imaging of the Sun in high resolution, and has served well in
            this regard. I did try the scope out on the deep sky this week,
            using the .7x field flattener I use for the Stellarvue astrograph
            to provide a sharp nearly coma free field. Performance was better
            than expected, and here is the result with the Canon XTi DSLR,
            and 15 minutes of exposure time.
 

            
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Optics:  6" f/6.5 ESAR152 with Televue .7x Corrector
Platform:  Astrophysics AP1200
Camera:  Hutech Modified Canon XTi @ ISO800
Exposure:  3x 5m
Location:  Payson, Arizona
Elevation:  5150ft.
Sky:  Seeing  8/10, Transparency 7/10
Outside Temperature:  35F
Processing Tools:  Photoshop CS2, Images Plus 3.82
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