I took this full disk shot in the form of a mosaic using the 100mm frac at f10. The original image is huge and well worth a look at on Flickr if your monitor is big enough...
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.