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OK - best way to focus spotless full disc is to use the edge. Keep moving in and out until edge is as sharp as possible. You may also notice some plage (white bits) near the disc edge when in focus but these, like spots and not always visible.
Of course ALWAYS post your images on IIS no matter what you think of them. The Sun can change over a matter of minutes and you may have captured something no one else has.
njoy
DG
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