Million Kilometer Filament CaK Shadow 8th February

The huge filament currently visible on the sun gives up it's appearance in caK light as it shadows the white plage of magnetic froth beneath it.  Spicules are much easier to see in this shot that was taken with the ED80 stopped down to 60mm, with the beloptik tri band, homebrew Cak filter and DMK31 at 960mm focal length.