M27, NGC 7331, and NGC 6888 – with ASI294 amp glow gone?

[AKB]

Still getting used to my ASI294 OSC attached to a new-ish Esprit 120ED.  Having now taken lots of darks and flats, I'm hoping to have vanquished the infamous amp glow (and I think I have.  Sort of.)

From the night of Sept 27, the first moonless session I can really remember, and all the more unexpected and ill-prepared-for because of earlier rain, I grabbed a few test frames.  A tad longer than my usual EEVA efforts, but still really too short for a good image, here they are (all with IDAS P2 filter, guided and dithered):

 

M27, Dumbbell nebula: (15 x 2 min)

This should be straight-forward, but I'm finding this a little on the green side?  (I'm aware of the benefits of SCNR, but declined to apply it.

 

NGC 7331 and friends, including Stephan's Quintet :(14 x 2 min)

Certainly not enough exposure time here,  but I was inspired by the lovely image posted recently here

 

My FOV is not really right for this, but the bonus is Stephan's Quintet nestling at the lower left.

 

NGC 6888, Crescent nebula (30 x 2 min)

A longer total exposure here.  Is that amp glow on the RHS?  Maybe I haven't conquered it yet...

I've always found this target really hard in RGB.  I've done my best with masked stretches to suppress the stars,  perhaps even over-done that?

 

Now need to decide on a target for much more careful acquisition and processing...

Comments and suggestions welcome.

Tony

[Adam J]

Looks great to me, OIII is always going to come out green in an OSC as it peeks in the  green channel. 

Apart from that you do have a little sensor tilt that could use sorting. 

Edited October 2, 2019 by Adam J

[AKB]

1 hour ago, Adam J said:

Apart from that you do have a little sensor tilt that could use sorting. 

Yes, indeed.  Not sure where that’s coming from... need to rotate a few things and see what moves.  Thanks for the comment on “green-ness” too!