December 2017: Rosette revisited

This time with long H-alpha exposures. Tne Moon was almost full, but the H-alpha filter worked excepcionally well, showing little gradient.

I tested 1,000-second long exposures, instead of the 600’s that I was used to. It worked ok, with a very good guiding done by the DSI Pro.

This is the final H-alpha image (stacking of 6):

Rosette H-alpha signed

I combined this image with old RGB subs taken a year ago and that had too much noise. Teh result, I think, is wonderful (I used the H-alpha as a R component).

Rosette HGB (6X100, 4X300) signed

Go to this object description and this image technical detail.