NGC6188 - first narrowband

[troypiggo (Troy)]

Not many targets suited to narrowband available in my limited field of view at home this time of year, but I have been wanting to try this one. Only used Ha (9x5mins) and OIII (10x5mins), because as I started collecting RGB it was around meridian and decided to pack it in.

Blend is Ha:OIII:OIII. I know it's very red/blue. I did play with a synthetic green from Ha for red and OIII for blue, but wasn't happy with the colours. So many variables with this NB imaging.

Any tips on processing greatly appreciated.

[renormalised (Carl)]

Like that a lot, Troy

That deep wine red really makes the dust and gas look solid and the blue isn't overpowering anything else.

Great shot

[Octane (Humayun)]

You should be very happy, that looks awesome.

The way you've framed it, it would make a great web site background, too.

So happy to see you using your new camera!

Awesome, mate.

H

[DavidU (Dave)]

I think thats a ripper Troy ! Is there a slight miss alignment between layers?

[peter_4059 (Peter)]

Great shot Troy. I'm surprised you got so much detail considering the light pollution.

[multiweb (Marc)]

You did real good Troy for such short integration time. Nice blend too.

[ozstronomer (Geoff)]

Well done Troy, that's a superb image. Really sharp and the colours are really impressive.

[Hagar (Doug)]

Looks great Troy. You have managed to keep the 3D effect in the two main layers of dust and gas and with so little exposure time.
You have to be happy with an image like this. Straight to the pool room with this one?

Very nice.

[troypiggo (Troy)]

Thanks heaps for the comments guys. So much more to the processing with these mono cameras and filters. And a whole lot more to it with narrowband. I haven't got a feel for when to draw a line between processing/stretching the Ha, OIII individual images etc before bringing them into the final image's colour channels. It all seems so arbitrary. Give the same data to 10 different guys and you'd end up with 20 different final images.

It was soooooo good to get enough data to finally be happy with something to post after all this time. Go the 10", the MPCC, and the QSI583

[CoolhandJo (Paul)]

The whole point of nb imaging is to bring out subtle detail that lrgb can't. You have done that well! The great thing about nb is the amount of creative license you have on the final image! Subjectivity is ok. Well done.

[Stevec35 (Steve)]

Not bad at all Troy. Excellent for a first up attempt at a "synthetic LRGB". I don't think you need too many processing tips.

Cheers

Steve

[renormalised (Carl)]

Just to add to my initial post...all you need now is the Enterprise or Voyager to be flying past and that'll look ace

[irwjager (Ivo)]

I like the color blend. You should be well chuffed with that for your first narrowband!

[RobF (Rob)]

I think Mike and others make it all look relatively straightforward, but there's obviously a lot of variables in this game. That's a very decent NB IMHO, especially for a first effort. It is fascinating the different detail NB brings out.

[troypiggo (Troy)]

Thanks again guys.

Did a bit of a repro using a bit of a luminosity boost thanks to Marc. I think I like this a bit better:

[strongmanmike (Michael)]

Quite a nice result Troy, the blue/red combo looks good. You are right about the number of colour pallet combos available ...but that's what makes narrowband so much fun

I can't work out if the blue sections on the left and right in your image are real though..? or is it from a vignetting/flats issue?

Mike

[TrevorW]

and a "ditto" from me

I'm yet to capture narrowband so I can't really comment although looks nice

[multiweb (Marc)]

Originally Posted by troypiggo

Thanks again guys.

Did a bit of a repro using a bit of a luminosity boost thanks to Marc. I think I like this a bit better:

Here's a quick repro. Hope you don't mind. I did that really quickly so it's not pretty but you get the idea.

From your original picture duplicate the layer then run a pass of gradient exterminator as you have some LP on the left of your field as Mike pointed out.
Create a group folder and dump the Xterminated sub in it. Got to the blue channel (greyscale) and copy paste it as a mask for the group folder.
Then select the Xterminated sub inside the group and apply curves and level to boost the blues. It should only affect the blue areas in your pic because you've masked the folder.

That's the technique anyway. You can refine to isolate the stars or do it a bit nicer than my quick repro.

[troypiggo (Troy)]

Thanks Mike , Trevor and Marc.

Re the blue, it's definitely there in the stretched OIII but not so much in the Ha. I did use flats for each of the filters. I've attached the stretched Ha and OIII I used so you maybe can see the difference. It's very likely that I did something wrong in my stretching, though.