First light with new Askar dual-band Ha/OIII filter. Cygnus Loop.

[Ouroboros]

Surprisingly we had clear(ish) skies here yesterday evening.  I was beginning to give up hope of ever testing my new Askar Colour Magic 6nm dual-band filter with my recently acquired Askar FRA300 I posted on in October. 

Inevitably perhaps the first target had to be the Cygnus Loop.  I should really have framed it differently.  I've chopped off some of the object at the bottom of the picture. But I didn't know whether I was going to get 20 minutes of clear sky or several hours. So I just went for it and in the end managed a modest 71 x 120s  reasonable subs out of 85 or so.  

I found my first process of dual-band interesting, and need to study how to do this rather better.  Stars in particular were a bit of a challenge.  Using  an unfiltered star field would probably be better I imagine.