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CCD or DSLR
http://www.boltonastro.co.uk/forums/viewtopic.php?f=4&t=918
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Author:  DRatledge [ Fri Dec 23, 2016 2:59 pm ]
Post subject:  CCD or DSLR

What is the difference between a 12-inch telescope with a cooled CCD camera and 4-inch with an uncooled Canon DSLR? Below are two equal total length exposures (5 hours) of the Pisces Cloud Galaxy Cluster - they were shot simultaneously.

The 12 incher + CCD has reached at least magnitude 21 and the 4-inch + Canon mag 18.66. Quite an amazing perfomance by a DSLR and 4 inch scope. I used Aladin to check the magnitudes. .

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rcos-v-Tak-n383.jpg
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