A Huge Sunspot Group 1476 - 12 may 2012

Huge sunspot group 1476. Taken at 12/05/2012, 11:00 (UTC+3), in Rehovot city, Israel. Click on upper image for full resolution version. Sunspot groups visible on the image: 1477 (bottom), 1478 (bottom), 1479 (left), 1476 (middle). The largest sunspot group 1476 was easily visible with a naked eye, with eclipse sunglasses. Telescope: Stellarvue ED80 refractor, white light solar filter (baader film). Camera: Canon EOS 500D DSLR in prime focus, with Televue 2.5X / 5X powermates (f/12.5 - f/35). Upper image is a stack of 100 frames, ISO 100, 1/500 sec. Lower image is a stack of 500 movie frames, iso 1600, 1/80 sec.