Monday, 4 May 2015

AR12335 CaK 4th May

The seeing was briefly quite good in CaK wavelengths first thing this morning before clouds started to bubble up and blow in turning the atmosphere into boiling soup.  I took this image with the 100mm TaL100R refractor at 1600mm focal length with the homebrew CaK filter and the Imaging Source DMK31 camera.