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IC 1805 the heart nebula

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#1 betelgeuse91

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Posted 22 August 2019 - 10:30 AM

It's a combination of good Ha data and poor RGB data, or poor Oiii data. RGB was taken a few days ago, under bright moon. 

 

I thought about processing Ha/Oiii in the usual hubble palatte color, but I decided to go this way because, it's supposed to be a heart. 

 

Thanks all for viewing! Advice and suggestions are very welcomed.

 

Equipment:

astro-tech at80edt

astro-tech x0.8 ff/fr

celestron avx

nikon d5300 full-spectrum

idas lps d1 48mm

baader 2" 7nm ha

baader 2" 8.5nm oiii

 

Acquisition:

ha: 5 hr with 10 min subs

oiii: 4 hr with 10 min subs

rgb: 4 hr with 3 min subs

@ ISO 200, FL 384mm, f/4.8

 

Processing:

all done in Pixinsight other than final color touch

color was tweaked in Photoshop

 

Recipes:

- HaRGB

L = 0.3 * ha + 0.7 * l

R = iif( ha>r, 0.8*ha + 0.2*r, 0.5*ha + 0.5*r)

G = g

B = b

 

- Ha/Oiii (made starless versions of each when blending for color)

L = ha

R = 0.3 * oiii + 0.7 * ha
G = ha
B = oiii + 0.15 * ha           (this should have been 0.85 * oiii + 0.15 * ha. This mistake was the reason why the bright parts are blown out white) 

 

 

RGB

4lKsvmdm.jpg

 

Ha

qZlMkP8m.jpg

 

HaRGB

jFKdclJm.jpg

 

Oiii

Z8sRJ43m.jpg

 

Ha/Oiii

xTNHaxRm.jpg

 

 

I honestly like the HaRGB the best. Although the bi-color imaging with Oiii filter is interesting, shooting Oiii with a DSLR is just not fun... It requires extreme processing, which is stressful. 

Although shooting RGB is troublesome here, Ha data is always so good regardless of the moon, light pollution, so HaRGB often turns out alright. (plus I really like the natural and colorful stars!)


Edited by betelgeuse91, 22 August 2019 - 01:09 PM.

  • psandelle, mikewayne3, elmiko and 5 others like this

#2 mic1970

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Posted 22 August 2019 - 10:45 AM

Very nice... thanks for sharing.



#3 betelgeuse91

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Posted 22 August 2019 - 10:59 AM

Very nice... thanks for sharing.

Thanks so much!



#4 GiorgioF

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Posted 22 August 2019 - 11:48 AM

I agree on the HaRGB as my favourite. It's a great combination using DSLR.
Really pleasant.

#5 betelgeuse91

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Posted 22 August 2019 - 02:02 PM

I agree on the HaRGB as my favourite. It's a great combination using DSLR.
Really pleasant.

It really is the best of DSLR..!



#6 elmiko

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Posted 22 August 2019 - 03:56 PM

Well done! Nice job on the processing. Thanks for sharing the details of the processing.

Mike



#7 betelgeuse91

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Posted 22 August 2019 - 06:41 PM

Well done! Nice job on the processing. Thanks for sharing the details of the processing.

Mike

My pleasure. Thanks!




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