Tuesday, 23 June 2015

Ha Full Disk 23rd June

My double stacked 40mm Coronado etalons definitely perform better - ie onband, at temperatures around 20 celcius, and today was one of those days, with lots of detail visible.  Even with a couple of spots the sun still looked good.  Taken at 650mm focal length with the PGR Blackfly IMX249 camera.