4 replies to this topic

[TomC_RR]

I am not sure if these qualify as SHO and HOO images - but this was fun and I would like comments as to what I could improve on.

 

I used OSC ZWO 2600 MC pro on my WO Z81 w/ .8 reducer FF

 

All processing was done in PI

 

I had 1 night using no filter and I used the star image from that for these 2 images.

 

For the SHO I took my 2 nights of using D2 filter for O3 & S2 separated color channels and then took 2 nights of L-Ult filter for the O3 & HA and separated color channels - and used pixel math the combine the 2 O3 images and channel combined for the completed SHO image.

 

For the HOO, did the same thing accept I kept the S2 out.

 

As I am writing this, I am wondering if I should have added S2 to the red channel. 

 

Anyway, please share thoughts on how to improve.

 

 

 

Can't figure out how to add 2nd image to post so I have a link

Edited by TomC_RR, 18 September 2024 - 10:55 AM.

[ntph]

In my mind, the most important things are: do you like the process and the results and are you having fun/learning sometthing/enjoying what you're doing. Looks and sounds like the answers are all positive.

 

Tons of information on doing this in various places. One of the best is Adam Block's YouTube sessions, where he gives you condensed versions of his paid content. He likes to stress the "fun" part, so you might enjoy them. 

 

Just a guess but by the size of the stars I am thinking you processed the channels "stars-in". If so, you could try processing them as starless versions for each of the channels then adding the stars back once they are processed to your liking. 

 

Various places to find useful scripts for doing this stuff:  Seti Astro, Bill Blanshan, Juergen Terpe all have repositories, as does Mike Cranfield, among others. Many have YouTube tutorials on what they are and how to use them. The Foraxx palette stuff is interesting too. This should give you a few places to start looking, beyond the stuff in PI already. 

 

You could add the Sii to the red channel, but it wouldn't be "HOO". Of course there are going to be those out there who argue using dual band filter data means you aren't really doing narrowband, but I just ignore them. 

[unimatrix0]

I am not sure if these qualify as SHO and HOO images - but this was fun and I would like comments as to what I could improve on.

 

As ntph pointed out, there is no qualification process.  You are taking images with a filter that narrows the emitted light to a specific band and then you transfer the image to be in the RGB by assigning the colors to be in one of those specific color bands. 

 

We aren't doing scientific measurements (unless i'm wrong and that's your purpose) , everything we capture is for visual representation of what's in deep space. 

 

There are HOO , SHO, HSO, OSH, OHS-  whatever you desire and whatever you are trying to achieve or like, there are no rules.  The only rule is, if you like the results or not.   

[danny1976]

I like both of them. Nice colors. I would brighten the SHO a bit. It is a bit too dark. 

[TomC_RR]

 

Just a guess but by the size of the stars I am thinking you processed the channels "stars-in". If so, you could try processing them as starless versions for each of the channels then adding the stars back once they are processed to your liking. 

 

Thanks for this tip. I did all the processing with channels combined. I will try to separate channels next time and see what happens.