Today I was fortunate enough to get my hands, for a few tens of minutes, on a Coronado 90 H-alpha telescope. Despite the bad seeing conditions (4/10) the view through the eyepiece was superb at low magnification.

Of course I’ve also attached the ASI 174MM camera and acquired a few image sequences.

Following is a full-disk image, with added color for effect; this is close to what the Sun looked through the eyepiece (well, the actual view was a bit more red):


And a different processing, with an inverted disk but positive protuberances, for a more…artistic effect:


Also, a detail shot:


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