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IC1318 and Sadr SHO

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#1 Tayson82

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Posted 21 October 2019 - 04:47 AM

My vision of narrowband Butterflys nebula.

 

Ha 25x900s
OIII 25x900s
SII 30x900s
Samyang 135/2 @f3.5
Ioptron CEM60EC
QHY695A

 

linf to full version https://www.astrobin...15qvyk/?nc=user

 

small photo

IC1318_sadr-small.jpg


  • astrovienna, elmiko, Andreas_Roerig and 11 others like this

#2 AKHalea

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Posted 21 October 2019 - 08:29 AM

That is a wonderful widefield SHO image for the area. It appears that this target has a significant amount of red (SII) emissions. I always thought SII emissions are quite weak in many common emission nebulae. This one seems to be the exception.  

 

I imaged the same widefield area about a month ago in Bicolor (HA & OIII). My image shows a lot of red in my HOO type processing which I thought was mostly HA. When I compare my image with yours, it appears that many of the red areas in my image are due to SII  and not HA. This is probably because my relatively wide (12nm) bandpass HA filter is catching both HA & SII as red since they are close to each other. Do you know of other commonly imaged objects that have a lot of SII in them? If so, it may be worthwhile investing in an SII filter for me. Thanks & Cheers ..... Anil


Edited by AKHalea, 21 October 2019 - 08:34 AM.


#3 Astrola72

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Posted 21 October 2019 - 08:29 AM

Stunning. This could hang in the Louvre. Well done!

 

Joe



#4 Tayson82

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Posted 21 October 2019 - 11:34 AM

Thanks for nice words.

SII is the most underraded filter. It gives "this something" in nb processing. I try use instesd sulfur low stretch hydrogen but it not working.

My baader SII 8nm gives big halo, which is difficult to remove. Choma have stars like a dots. Great filters!

#5 GA-HAMAL

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Posted 24 October 2019 - 02:03 AM

Spatial imaging. The varied colors reveal many usually invisible nebula details smile.png



#6 Tayson82

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Posted 24 October 2019 - 11:54 AM

Si ;-)

#7 BenKolt

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Posted 24 October 2019 - 01:12 PM

My vision of narrowband Butterflys nebula.

 

Ha 25x900s
OIII 25x900s
SII 30x900s
Samyang 135/2 @f3.5
Ioptron CEM60EC
QHY695A

Tayson:

 

A nice image!  I have been working on making a SHO image of this same area around Sadr and the Butterfly Nebula.  Interestingly, I see some subtle differences between our images, which I imagine are due to possibly using different filters, but particularly due to different choices in adjusting the color curves.

 

What are the widths of your NB filters?  I use 3nm for each.

 

Best Regards,

Ben



#8 Tayson82

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Posted 24 October 2019 - 03:08 PM

36mm Chrom Ha 5nm, Chorma OIII 3nm, Baader SII 8nm.


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