Wednesday, 8 October 2014

CaK Full Disk 7th October

I was surprised to see the skies clear on tuesday afternoon so decided to try and get some solar shots.  Despite a deep blue sky after weather fronts had come through the seeing was terrible, and even with the 40mm at CaK wavelengths the limb of the sun was showing a continually changing saw tooth pattern in the unsteady atmosphere and low sun.  So, needed to back off the focal length a bit here to 560mm to somewhat compensate for this.  I'm pretty pleased with the results as at this time of year some sun is better than no sun!  Taken with the 40mm scope at 560mm focal length with the homebrew CaK filter and the DMK31 camera.