Hydrogen Alpha Sun

10:39 17/2/2006 UTC

I managed to take my PST out for the first real imaging attempt. I took overexposed images in purpose to expose prominences correctly and get disk details from the green channel (the intergral Bayer filter leaks Ha to other channels also). I processed the image according to excellent tutorial of IRIS. The image is coloured to give a little better contrast over pure red image. There is even some disk details visible and one prominence (it's the same one I imaged earlier through a window). Focusing is a bit difficult, but that could be also seeing, since Sun was really low at the moment.

sun-2006.02.17-10h39m.jpg

Camera: Canon PowerShot A70 digital camera | Telescope: Coronado PST 40mm f10 H-alpha solar telescope <1Å bandpass | Mount: Manfrotto photo tripod | Filters: - | Guiding: - | Exposure: 8 x 1/13s f11.4 ISO50 | Software: IRIS, GIMP | Location: 60°31'N 26°52'E (Koivula/Kotka,FI) |