Sunspot 1515 in Hydrogen Alpha This naked eye sunspot region was taken with John Blomquist’s double-stacked hydrogen alpha filter system on a customized Televue 102i refractor and my color Philips ToUcam webcam and G-11 mount.
You can see the plasma fibrils flowing with the magnetic fields surrounding the sunspot. The brighter areas in the center region show Field Transition Arches which are areas of opposite magnetic polarity.
Tele Vue 102i f/8.6 APO with double-stacked Hydrogen alpha configuration (BW= 0.5 ЕngstrЖm), eyepiece projection with a Tele Vue 20mm Nagler, , Stack of 633 images using a Philips ToUcam Pro II - PCVC 840K, 640x480 webcam, IR Rejection Filter, Losmandy Gemini G-11 EQ mount. Processed with Registax 5.1 and Adobe Photoshop. ATMoB Clubhouse, Westford, MA, Image by Al Takeda and John Blomquist, 1 July 2012.
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