Possibly my best CaK shot to date, taken at 3200mm focal length with the 100mm this is a 4 pane mosaic of this massive cluster of active regions. This shot is well worth a look at full size on flickr.
Images of the Sun, our local star, at a range of wavelengths with specialist solar telescopes. Imaging tutorials, solar bits and pieces for sale, talks and outreach with the Charlie Bates Solar Astronomy Project CBSAP.