IC63 Narrowband

[jcmoreno]

Hi,

Living in a city, the only way to shoot the nebulae is through the narrowband filters. This december & january I was taken IC63 through H-alfa / O-III / S-II. And combine them to look almost a nebulae in RGB.

The data:
Telescope: Sky Watcher 80ED + WO x0.8
Mount: HEQ5
CCD: Atil 314L+
Capture: ImagesPlus 4.25
Guiding: PHD

Processed PixInsight 1.7

Exposures:
H-alfa: 38 x 300s
O-III:   12 x 600s bin 2x2
S-II:     12 x 600s bin 2x2

LRGB Combine:
L - Ha (bin 1x1)
R - Ha (reduced to bin 2x2)
G - ( 0.3*O3) + (0.7*S2)
B - O3

After many hours trying to reduce noise and calibrate colors, this is the result:


I will appreciate very much your advices.

Juan Carlos

[Lex]

Hi,

I think your image is a to dark. IMO you have clipped a lot of data with Histogram.
With the set of exposures there should be very much more detail.
Another thing you can try is to blend the different channels in Pixel Math:
R: 0.8*SII+0.2*Ha / G: 0.2*Ha+0.8*OIII/ B: OIII

Perhaps you can slightly adapt the factors in order to achieve the result you want.

Hope this helps

Best!

[Alejandro Tombolini]

Hola Juan Carlos,
Beautiful image. I agree that you may have clipped too much the shadows. It is too dark.

I saw in your page that you have made very interesting projects!, Congrats on all of them. I like the auto focus for DSLR!!!
Saludos. Alejandro.

[jcmoreno]

Hi Lex,

I don't understand the channel blending indicated. How to create the Green channel ?

I will try another histogram adjust for don't clip a lot of data.

Hi Alejandro,

Thanks for yours comments about the projects. I have a lot of work to update de web. I will try soon to include more projects.

Juan Carlos

[Lex]

Hi Juan,

I did not type what I meant. I modified my post; sooooorrry 

Best

[jcmoreno]

Hi,

I generated a new version with a not too dark background. I lighten a little the shadows in the last step (curves adjust).

Lex, thanks for the formula, this weekend try to process with a green with more O-III than S-II.

Thanks to all,

[Lex]

Hi,

you are absolutely welcome! 
You image is also already a lot better than the first one; well done!

Best

[jcmoreno]

Hi,

Thank for the sugestions. I tend to leave the background to dark. I must correct this tendency.