16 replies to this topic

[SeymoreStars]

I wish I knew why the colors came out this way, I really don't know.

 

3 - 14 minute exposures of Sii

3 - 14 minute exposures of Oiii

3 - 12 minute exposures of Ha

 

The Ha looked very strong and the Sii and Oiii looked weak that why the exposures were varied.

 

PixelMath was used and the colors were define using the SHO palette.

 

Red    = Ha * .3 + Sii * .7

Green = Ha * .6 + Sii * .2

Blue = Oiii

 

The data was imaged on November 12, 2018 and the scope used was a 140mm refractor.

 

Please offer C&C thanks!!

 

Edited by sink45ny, 28 January 2019 - 04:09 AM.

[einarin]

Not my personal color preference but YMMV.

How did you combine the color channels ?

[SeymoreStars]

I edited the post and put the formula in it above. Also I just figured out how to turn it red and will post and updated picture shortly.

[SeymoreStars]

I think some of this stuff is starting to sink in ;-)

 

Also realize it is suffering from a lack of Oiii & Sii data, or at least I think so.

 

Edited by sink45ny, 28 January 2019 - 03:50 AM.

[lynnelkriver]

Hey Steve this is a great image!  Scott

[SeymoreStars]

Thank you very much lynnelkriver. I just finished imaging the Rosette again minutes ago with the CDK17, a much narrow FOV results. The data looks good so far, 50 minutes of each NB channel Ha, Oiii and Sii.

[SeymoreStars]

I know more data is needed but I'm still learning the ropes. The night yielded 5-10 minutes images of each channel Ha, Oiii and Sii. This was done with the CDK17 much narrower FOV.

 

https://www.astrobin.com/388341/

 

Edited by sink45ny, 29 January 2019 - 02:09 AM.

[SeymoreStars]

I like the green one better added an ACDNR step to each linear channel.

[SeymoreStars]

I am intrigued by this object, went after it again tonight. I will try to combine this data with the data from the image above and see how PI handles that. Caught more of those dark dust lanes.

 

Edited by sink45ny, 31 January 2019 - 02:39 AM.

[Seanem44]

I could stare at images of this nebula all day.  When I shot and processed mine, I would zoom in on separate dust clouds.  So much going on in it.

[gunny01]

  Hi Steve,

 

  You might want to try sho script in pi,  instead of messing with pixel math formularies.  With nb you usually end up with green overall image, and I think scnr will take care of that at the end of processing.  The flow chart in keller's book does a good job of breaking down the steps.

 

  I usually use ps after processing with pi to get the final color that I am looking for.  With NB, there is color limited only by your imagination.

 

  Another thing I did notice is that your integration time is not all that long..............Gunny

 

PS  How do you like the Chroma filters? 

[SeymoreStars]

Thanks Gunny I'll check out the SHO script, didn't even know there was one. The Chroma filters are working out good and cheaper than AD's.

[gunny01]

  After the combo of SHO subs into a single color image, I'll apply SCNR green filtering just to see what the final image will generally look like for color.  I'll then remove SCNR and proceed with the remaining flow chart processing.  I believe that in Keller's book, SCNR is applied at the end when all the masks are removed.

 

  You've got a very nice rig there Steve.  PI will come along with time, but PS can do things that I've not been able to get out of PI.   Were you able to find the SHO script?

[SeymoreStars]

  After the combo of SHO subs into a single color image, I'll apply SCNR green filtering just to see what the final image will generally look like for color.  I'll then remove SCNR and proceed with the remaining flow chart processing.  I believe that in Keller's book, SCNR is applied at the end when all the masks are removed.

 

  You've got a very nice rig there Steve.  PI will come along with time, but PS can do things that I've not been able to get out of PI.   Were you able to find the SHO script?

Unfortunately Gunny The SHO script has been removed from PI.

 

https://pixinsight.c...p?topic=11295.0

[lynnelkriver]

Love the details. I feel like I'm being pulled into the "hole"!  Scott

[StephenW]

Unfortunately Gunny The SHO script has been removed from PI.

 

https://pixinsight.c...p?topic=11295.0

 

It's still available here: http://pixinsight.com.ar/repository/ , in the  AIP-Multichannel.zip file.  I use it and it works well.

[gunny01]

  Yeah,  I never understood why the PI people turned a deaf ear to leaving this script alone and not removing it from the script menu.  A lot of people use it and it seems Juan went and removed it anyhow.  It was one of the things I didn't like with PI revisions, along with not having some type of brush function similar to PS.

 

  No apologies to the PI purists from me..................