The cave nebula (Sh2-155)

[andyo]

Hi,really not getting much time this year for imaging due to work commitments but here is one I have managed over the last couple of months called the cave nebula. The dark cave is caused by intersteller dust that obscures light from the background stars and the nebula itself. 

Its HaRGB

 18 x 900sec Ha

then 15x300sec R,G and B each

The Ha was added to the red channel using the method Olly suggests by adding the Ha to the red channel using a couple of iterations in blend mode lighten. However I still found this target very difficult to process 

 

 

[MarsG76]

For a difficult object, you did very well, looks great.

 

[andyo]

23 hours ago, MarsG76 said:

For a difficult object, you did very well, looks great.

 

Thanks MarsG76

[MikeODay]

Wonderful image - I love the colours.

[andyo]

18 hours ago, MikeODay said:

Wonderful image - I love the colours.

Thanks Mike