Wednesday, 3 April 2013

AR11711 Ha - 2nd April

AR11711 colour by Mark Townley
AR11711 colour, a photo by Mark Townley on Flickr.

Monster active region AR11711 really is a treat in all wavelengths. This was taken with the 70mm PST mod with a televue 2.5x powermate to take the focal ratio up to f17.5. This high power setup seems to take the not so good seeing conditions really well.