Badder Astro Solar film was used as the filter for this image of a large sun spot group. If you look carefully at the image you can also see some surface mottling. The sun spots are many hundreds of Kilometres wide
250mm F5 Newtonian telescope with a 50mm sub aperture mask on a EQ 6 mount. Philips Toucam Pro web cam
K3 CCD Tools & Registax
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