The key ingredients for the whole disc shots as I do them is the DMK 41AU02.AS or similar size CCD, the ED80 to similar (600mm) FL scope and photoshop to merge 2 images to make the full disk (and of course the Ha filters).
Processing is pretty simple too... the key there is playing in curves to bring out the detail on the disc as well as the proms around the limb... usually means a double humped curve
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Al.