Perfect timing Shawn as I just happen to be processing Ha/RGB for M81 as well. Much like you I found the Ha was getting a little cut, so I'm running this approach now. Thinking out loud, I don't know why I didn't think of it, so again thanks for sharing!
Thanks Shawn. Pixel math is a mystery to me. So when you say to put a minus instead of a plus in the formula I found myself wondering what you where doing. Seeing the result I was amazed. Great tip 😊
I will try this. When I recently used this same target, my Ha data made the whole galaxy look pink instead of just the Ha regions. I can't quite figure out where I went wrong.
Lovely tip. I had to use a GAME mask, though not on H α , on NGC 4565 because StarXterminator removed the galaxy’s ‘arms’ as well as completely removing NGC 4562. I spoke with Russ and he said that this is a known problem with the present iteration of StarXterminator and he is working on it. I will use this when I go back and look at my Bode’s galaxy data. I have an OSC image as well as a L-extreme image from which I have extracted the red channel. This may be a nice way of maintaining H α in M81.
Great tip, Shawn! I was trying to do the same as you did some time ago, but since I have my head upside down, I was *adding* the stars instead of subtracting them. Of course my mask didn't work at all. Hahaha. Thanks, man!
Just awesome! Now I just need to learn how to incorporate Ha data into my images at a basic level. I have never done it before. I bet you have a video already on that somewhere. I shoot OSC so technically I would be incorporating duo band data. Thanks Shawn.
Hey Shawn, I thought that it was necessary to subtract the red channel (multiplied by a number that depends on the red filter and the Ha filter) from the Ha image to retain only true Ha data. By doing that, the stars are pretty much all gone, and only true Ha remains. Am I missing something? I did that on M106 last year, and it worked amazingly well! CS!
I note that you are using the Lite version of AI 11, how does it affect the galaxy if you are using the non Lite version i.e. StarXTerminator 11? I always tend to use the non Lite version and hardly notice any loss of details on galaxies
This is SO helpful!!!! Thank you for sharing it!
BRILLIANT!! I was having the exact same problem. I tried your method and it worked like a charm...."YOU Da MAN"!!👍👍👍
Just what I needed Shawn I’m imaging these next clear night
Thank for another great video
You teach this task very well! Thanks
You're welcome! I also do one on one sessions!
Pretty amazing Shawn
another good video Shawn
Thanks for another great video Shawn - that's a very good method that will certainly help me with M81 and other galaxies! Clear Skies
Very nice technique, Shawn! Thank you.
Brilliant tip. Thanks
Very helpful. Thank you.
i was just battling that withg 81/82. good video. will have to give it go. thanks for sharing
Pretty cool Shawn! Great tip/
That’s super cool!
Excellent . Thank you
Perfect timing Shawn as I just happen to be processing Ha/RGB for M81 as well. Much like you I found the Ha was getting a little cut, so I'm running this approach now. Thinking out loud, I don't know why I didn't think of it, so again thanks for sharing!
Thanks Shawn. Pixel math is a mystery to me. So when you say to put a minus instead of a plus in the formula I found myself wondering what you where doing. Seeing the result I was amazed. Great tip 😊
Nice one
I will try this. When I recently used this same target, my Ha data made the whole galaxy look pink instead of just the Ha regions. I can't quite figure out where I went wrong.
That can happen. To much to type out here. Different approaches depending.
Lovely tip. I had to use a GAME mask, though not on H α , on NGC 4565 because StarXterminator removed the galaxy’s ‘arms’ as well as completely removing NGC 4562. I spoke with Russ and he said that this is a known problem with the present iteration of StarXterminator and he is working on it. I will use this when I go back and look at my Bode’s galaxy data. I have an OSC image as well as a L-extreme image from which I have extracted the red channel. This may be a nice way of maintaining H α in M81.
Great tip, Shawn! I was trying to do the same as you did some time ago, but since I have my head upside down, I was *adding* the stars instead of subtracting them. Of course my mask didn't work at all. Hahaha. Thanks, man!
Just awesome! Now I just need to learn how to incorporate Ha data into my images at a basic level. I have never done it before. I bet you have a video already on that somewhere. I shoot OSC so technically I would be incorporating duo band data. Thanks Shawn.
Shawn is it possible for me to add duoband data to my OSC images of M81? How would the processing differ? I want to highlight those beautiful areas.
Hey Shawn, I thought that it was necessary to subtract the red channel (multiplied by a number that depends on the red filter and the Ha filter) from the Ha image to retain only true Ha data. By doing that, the stars are pretty much all gone, and only true Ha remains. Am I missing something? I did that on M106 last year, and it worked amazingly well! CS!
There are of course different ways to approach this.
Cool Man! CS!
Awesome tip Shawn. Do you have a video showing how you combine the Ha data to the RGB data?
I have a video for combining Ha and RGB. In nebula. Maybe galaxy as well. I really can't recall after more than 200 vids. Lol would have to look.
hi Shawn
how to get pixinsight software ? im trying to contact with company in website and no answer !!
I note that you are using the Lite version of AI 11, how does it affect the galaxy if you are using the non Lite version i.e. StarXTerminator 11? I always tend to use the non Lite version and hardly notice any loss of details on galaxies
Ya I tried with all versions of AI and didn't have much difference. But it could just be my data on this. I'd have to try with other data.
Why not just apply the mask without removing the stars from it if you want to keep the stars in the galaxy?