The Fighting Dragons in HOO and SHO. About 4 hours each of O and S and 8 hours of Ha. This was largely an experiment to see how different dark sky site narrowband imaging is compared to suburban - as I tried this in the 'burbs last year. Considerably less noise, of course, from only half the exposure time (though a different camera and filters, so not entirely a fair comparison - the Chroma filters do not suffer from the nasty halos that the ZWO ones do on the brighter stars).
The HOO image has Ha applied as a luminance layer as it was a bit fuzzy without that. Hence it is a HOOHa image - pronounced as it looks!
(The SHO image also has a similar trick - since the Ha covers most of the structures in this area. Hence that is an HaSHO image - pronounced like a sneeze!
).
Astrobin images are
here and
here.
Suggestions/comments welcome.
Paul
