Sunday, 21 February 2016

AR12502 & AR12503 in CaK - 18th February

While there is nothing particularly special or interesting in terms of the features that can be seen in these two active regions, what I do like about this picture is that it hints at some of the details that can be seen at 100mm aperture when the seeing is good, especially when viewed at full size.  The seeing wasn't perfect here, but for a cold february morning it was pretty good!  Taken with the 100mm Tal100R refractor at 3300mm focal length, the homebrew CaK filter and the PGR Blackfly GigE IMX249 camera.