Monday 11 May 2020

Ha Full Disk 9th May

ha-fd-ds-colour

Trying a different setup here (of sorts!); the Lunt 50mm etalon on the 60mm f6 scope, the Airylab 2.7x telecentric on the Daystar Quark etalon.  This has the benefit of the image fitting on the camera chip without using the Baader solar telecompressor, which, I think adds some softness to the image.  The caveat is the system runs at a higher FWHM, so not as much contrast, but the full disk has a more even illumination.  This system needs a little more testing to see if I like it, as was difficult to judge the on band position with such a featureless sun, in this instance I concentrated on getting the filaments at their darkest.