White Light Sun Spot AR11711
By Guest
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A large sunspot, AR11711, came around the eastern limb yesterday (north is up in this image). I captured it in white light today through my WO 132mm f/7 refractor, Baader Herschel Wedge, and Point Grey Grasshopper USB 3.0 camera. I used a 2.5x Powermate for this shot and stacked approximately 250 frames with AutoStakke 2.0 and processed in PS
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