Monday 25 March 2013

CaK Full Disk - 25th March

cak full disk bw by Mark Townley
cak full disk bw, a photo by Mark Townley on Flickr.

Despite our sun being quiet at the moment there is still plenty to be seen in CaK wavelengths. Despite some haze, my new CaK filter design was still achieving exposures of 1/500th sec with the 70mm @ f6, considerably shorter exposure than I was getting previously - great for freezing out those moments of good seeing!