NGC6888 - First attempt at Ha & OIII

[gingergeek]

Hi,

Lots of issues encountered, things to learn and lots more to understand when I attempted my first mixed narrowband image. Two days wasted with egg shaped stars due to poor polar alignment courtesy of the Skywatcher controller routine and noticed by Steve Richards ..... thank you again !

So since I've never done this before here is a quick and dirty Pixinsight process via Pixelmath.

Personally it feels a bit too red for me, Geekgirl likes the OIII shell so I think it could do with more OIII to bring it out more and maybe add in some SII at a later date.

Subs - 10*15min Ha 5nm Astrodon and 8*20min OII 3nm Astrodon taken on Atik460, EFW2, WO ZS71 (f4.7), OAG Lodestar

Regards

GG

[carastro]

Excellent first mixed NB image Mark. Love the detail and the fact that you've captured the outer shell.

How is the colour mapped?

Carole

[gingergeek]

Carole,

We just checked and it was R:Ha, G:Ha*0.2+OIII*0.75, B: OIII

[andyo]

that's nice,good outer shell

[swag72]

I think that looks very nice indeed Mark. The detail is good and I personally dont think it's too red. Your fov is very pleasing as well. A top image - Well done!!!

[gingergeek]

Sara,

It was hard going for me since just doing Ha is a breeze and a lot of fun. When I stopped doing the Ha a couple of minutes later the mount did a meridian flip so the the OIII frames were different to the Ha so another learning exercise to get the two images aligned ready for Pixelmath.

I would love to have a go at LRGB imaging but with an obnoxious street light at the bottom of my surban garden it may not happen.

[gingergeek]

Hi,

A remapping of my original to R:Ha, G:Ha+OIII, B:OIII and easier certainly on my eyes than the red mapping. I wanted to show the OIII in the shell and clouds more as well.

Regards

GG

[swag72]

This colour rendition has really highlighted the soap bubble Mark. A very tricky target to capture and there it is for all to see. Very nice indeed and well done!

[gingergeek]

Thanks honey

[steppenwolf]

Really like the second version, Mark - so good to see the Bubble Nebula so nicely captured at bottom left of the frame too. You've brought out some nice detail in the Crescent's halo at 2 o'clock. All in all - a really pleasing image!

[gingergeek]

Steve,

Thank you, I've only got this far because of your help ! The stars in the top left and bottom right are slightly stretched but for now I'm a happy bunny and I will move on to another target.

[AndyUK]

I too prefer the second version... As Sara and Steve have noted, you've captured the OIII shell very well, but the fact that you can clearly see the soap bubble makes this an excellent image