Sunday, 21 May 2017

Dark Filament - 21st May

Todays filament was a particularly dark one, though, I could not see it in CaK wavelengths.  This shot was taken with the 0.2m Airylab HaT telescope, using a double stacked Daystar Quark and shooting somewhere around 4.25m focal length.  A 0.7X Baader Solar Telecompressor was using, as was a PGR Chameleon 3 camera using 2x binning to give effective 6.9um pixels and also the give a fast 2ms exposure time in an attempt to freeze the best moments of seeing.