AR12740 in CaK 4th May

Taken with the Skywatcher Ed80 stopped down to 60mm AR12740 seems to still have some more activity in it as it rounds the face of the sun.  Double click on the picture to see the larger version.  Both prominences and the spicule ring are easily seen in this image taken with the Homebrew CaK filter, this has recently been tweaked to improve contrast in Calcium light.