Taken with a pair of SM40 externally mounted etalons and a PST etalon mounted internally in the focuser. Lots more detail visible at these narrower bandwidths - looks quite different to double stacked!
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.