Astrophotography Narrowband Post-Processing PixInsight Workflow | North America Nebula

Hello Astro Friends!
In this tutorial, I'll walk you through how I post-processed my monochrome data of the North America Nebula (NGC7000) using PixInsight. The purpose of this video is to provide a step-by-step process of how I would process narrowband data of a deep space object like this emission nebula after I've completed all of my pre-processing workflow steps (e.g., calibration, image alignment, cosmetic correction, normalization, integration, etc).
The music in this video was created and produced by ‪@JasonMaths‬
The color palette used in this tutorial is created by using a ForaxX Dynamic Narrowband expression combination in PixelMath that I learned from ‪@PaulymanAstro‬ ! Please check out his KZbin channel and subscribe if you haven't already. Link to his Forax video here: • The Forax Narrowband P...
Star Removal - StarXTerminator: www.rc-astro.com/resources/St...
Star Removal - StarNet++ (Free): www.starnetastro.com/download/
Imaging Equipment:
-ZWO ASIAir: bit.ly/3OH834R
-Telescope Mount: amzn.to/40Tqara
-Imaging Telescope: William Optics FLT 110 APO Refractor f/7 (discontinued)
*Comparable: William Optics FLT 120 APO Refractor f/6.5
bit.ly/3IMymCJ
-Imaging Camera: bit.ly/3OUlfDk
-Filter Wheel: bit.ly/3oGmziw
-Filters:
*Broadband Filters: bit.ly/3N2Ezgx
*Narrowband Filters:
~Ha: bit.ly/3C3iPL3
~Oiii: bit.ly/45F4K40
~Sii: bit.ly/45F35LM
Guide Camera: bit.ly/3IMFI9u
Guide Scope: bit.ly/3N16Ns4
-Guide Scope Saddle: bit.ly/3MBaSSi
-Power Converter for Mount: amzn.to/40q8DXH
-Power for Camera, ASIAir, Mount: amzn.to/3G9aNmk
-3D Printed Alt, Az + Counterweight Knobs: www.etsy.com/shop/MPAstroDesi...
Affiliate Links:
I am an affiliate partner with Agena Astro, High Point Scientific, and Amazon. Some of the links above are affiliate links, which means at no extra cost to you, I will make a small commission if you use them to make a qualifying purchase. This supports the channel so I can continue creating videos. Thank you for your support!
#astrophotography #telescope #deepspace #deepsky #nebula #beginner #spacephotography #pixinsight

[@SarahMathsAstro]

If you would like to support this channel and follow along in PixInsight with the Ha, Oiii, Sii master light files, please consider becoming a Patron over on my Patreon page here: www.patreon.com/SarahMathsAstro Thank you!! :)

[@DSOImager]

What!!! No DBE!!!! LOL, no worries on that.. I have skipped DBE myself on a few NB images when there is no apparent gradient and the nebula takes up the whole frame. Awesome image at the end. It was interesting to watch your workflow... we all do things a little different. I picked up a couple of tips to try. :) CS!

[@SarahMathsAstro]

Haha, I was so nervous to do a narrowband workflow for others without DBE :X but I’m glad to hear others don’t always use it either. Thanks for the feedback as well! I always find it interesting watching others’ workflows too. Each person does it differently and each data set is also different, which makes for endless learning! Cheers!!

[@Kryssstals]

I’ve just followed this tutorial and I feel like I’ve made a huge leap in my knowledge. You touched on processes that I haven’t yet come across, like linear fit. So, thank you!!!! :)

[@SarahMathsAstro]

I am so happy to hear this!! Thank you for watching and stopping by! :)

[@midwestastro]

Great image! Thanks for the tutorial and explanation of the workflow, especially when doing pixel math. I look forward to seeing more

[@SarahMathsAstro]

Thank you, Don and thank you for the feedback. Clear skies to you!

[@astrojourneyuk]

A great tutorial there Sarah, thank you for putting it together and sharing. That approach has got me the best I could get from my narrowband image in terms of colours and detail. Thank you!

[@SarahMathsAstro]

Thank you very much and thank you for stopping by! Clear skies to you

[@rodneybutch454]

Great detailed instruction on forax processing. NGC7000 just came available through the trees for imaging. I did the data collection and processed using the forax method. Just posted it today on astrobin under milkywayrod. Thank you for the video.

[@SarahMathsAstro]

Thanks, Rodney! I tried to find you on Astrobin. If you could provide a direct link, I'd love to check it out.

[@rodneybutch454]

Hi Sarah. I'm not sure if my reply went through so I'll send it again. My mistake. I posted my call name to you as milkywayrod, but is should have been milkywayrod22. The direct link to NGC 7000 is www.astrobin.com/si4oud/# . Check out my other images on Astrobin. I have gone through your other posts and they really offer a different perspective on processing and gear set up. New perspectives are how we learn from each other in astro. Keep up the good work. I look forward to your next adventure. How is your work going in graduate school? Bet that your astro imaging takes a hit! Rodney

[@SarahMathsAstro]

Hi Rodney, thanks for the update on this. I saw the image and gave it a comment and a like, as well as followed you on AstroBin - NGC 7000 turned out beautifully and I appreciate you giving the video a call out. I'm happy to hear that the PixelMath made sense, too - as I know from personal experience it can get a little tricky. You've also got quite a lovely repo of images. I love the color palette that you use in several of your images. I've always been a big fan of dusty blue and orange/reddish color combinations. I also must add that I enjoy your default image of a point spread function of the Andromeda Galaxy (I think it's Andromeda). So cool! I need to start posting my images to AstroBin as well. Thanks for giving this workflow a go and for all the wonderful feedback, too. I'm very happy to hear that the videos are helpful and that even though they are a little different, that they are still of good use. I have lots going on at the moment, but hoping to continue to make more videos as I can. Looking forward to hearing from you soon! Clear skies -Sarah

[@stefanbalzer611]

Great tutorial! I think the workflow is great. I especially like the colour combination using ForaxX Dynamicc Narrowband expression combination. I definitely have to try it out.

[@SarahMathsAstro]

Thank you! Yes, please give it a try and let me know how it goes. I’d love to hear!

[@user-df3vp1dc7l]

This has been my goto video for processing my narrowband. I have learned a lot on how to make sure my pictures are coming out looking spectacular. Thank you! Keep up the great work and clear skies!

[@SarahMathsAstro]

Really happy to hear this, Keith! I would love to check them out if you're on Astrobin or IG! Clear skies to you!

[@tombock336]

A lot of great tips here, Sarah, and a few processes I only rarely use but know I need to get much more familiar with. Great stuff!!!! Hope u keep going with more tutorials! 👍

[@SarahMathsAstro]

Thank you, Tom! I apologize for my delay, I had an eye issue going on which left me unable to look at screens for a bit. Thank you again for the support and clear skies!

[@geitemans]

Great tutorial! I love your end results, nothing too shouty, nice and mysterious. I'll give your expressions and workflow a go on my next target

[@SarahMathsAstro]

Thank you! I'd love to hear how it turns out!

[@DavidSilesIT]

I like a lot the way you stretch the images using statistics. Very good approach and great video!

[@SarahMathsAstro]

Thank you, David! I'd like to try Generalized Hyperbolic Stretching for my images in the near future. Thanks for stopping by and for the support!

[@theambient1]

absolutely stunning result! I much prefer this kinda "dark" style, really draws you in!

[@SarahMathsAstro]

Thank you! Sometimes I go for a fainter, lighter look but I was going for a darker appeal with this one for sure. Sorry for my delay as well, I was battling an eye issue which left me unable to look at screens. Clear skies to you!

[@lairmore1]

Very complete instructions and an excellent tutorial. Thank you for taking the time!

[@SarahMathsAstro]

I’m so glad to hear that. Thank you for the kind words!

[@hotflashfoto]

I have not yet imaged any DSOs and the image editing just blows my mind. So much to learn. Your video explained the steps you used as you went. It's also easy to see that you have a knack for this. I like the digital way you approached it. Very repeatable, and it makes sense to me even with having never edited in this manner before. Great job!

[@SarahMathsAstro]

Thank you very much for the kind words and thoughtful feedback. It's much appreciated and I'm glad it made sense, too!

[@benc7102]

Gday Sarah Great tutorial & interesting to see your work flow. Final image looks fantastic Thanks for time & effort into producing content Cheers

[@SarahMathsAstro]

Hey Ben, thank you for taking the time to watch and for your feedback! Appreciate it a lot. Cheers to you!

[@John-en2cd]

Hi Sarah, very nice Workflow. Easy -to-follow and you had my attention the whole time. Great job! Thank you. John

[@SarahMathsAstro]

Hi John, thank you for the kind words and for taking the time to watch. Cheers!

[@TheRatlord74]

The amount of depth you got in that image is astounding. Nicely done.

[@SarahMathsAstro]

Wow, thank you very much!

[@stephenmcarthur2250]

Wow, awesome videos, love the workflow and the great tuition.

[@SarahMathsAstro]

Thank you, Stephen! I really appreciate that!

[@tullyfisher]

Really cool processing tutorial Sarah! Clear skies :)

[@SarahMathsAstro]

Thank you, Tully! Clear skies to you too :]

[@LogansAstro]

Really interesting to see a different workflow - I may have to try out a few of these formulas on my next image. Great final image too.

[@SarahMathsAstro]

Thank you, Logan and thanks for stopping by. I’d love to see what you come back with using some of the expressions. You already do such fantastic work! Cheers

[@sunkhaze]

Lots of great tips, Sarah! I would love to know more about how you get from your imaging session up to the starting point in PI as well!

[@SarahMathsAstro]

I'm glad you found this useful! I've been considering doing a pre-processing workflow in PixInsight. I'll have to add that to the list. Thank you!

[@danjensen9425]

Wow nice work flow. I just got into narrowband and my first set of data to work with the west veil nebula. Incredibly more complex the processing of this data. I’ve had pixinsight for a year now but never used it from the start . Stacked in dss or app . I new I had to relearn pixinsight. So I bought masters of pixinsight six video set to have reference of the basics. It’s 3:30 in the morning and I’m on my iPad. I find your video . Liked and subscribed. I look forward to your other targets and how you processed them. Awesome , best on KZbin yet for understanding and following what your doing. Thank you for your efforts in bringing this to us.

[@SarahMathsAstro]

Thank you, Dan. I commend your astro journey - it sounds like you're not afraid to tackle the new which is fantastic! I look forward to hearing more about your progress! Wishing you clear skies.

[@DavesAstrophotography]

Thanks Sarah, that was a great walk through of this process.... everyday a school day!

[@SarahMathsAstro]

Thank you, Dave! I couldn't agree more with you - everyday really is a school day! I'm always learning something new.

[@jefflucas_life]

Great refresher in post processing in P.I. Thumbs up 👍!

[@SarahMathsAstro]

Thank you very much!

[@biancoeblu]

Fantastic tutorial, thanks for that! I learned so much in these 37 mins...

[@SarahMathsAstro]

I'm so glad to hear this! Thank you!

[@AstroCrescentDIY]

Very well done 👍🏼. Thanks for sharing your knowledge.

[@SarahMathsAstro]

Thank you very much and thank you for taking time to watch!

[@lukomatico]

Nice work Sarah!

[@SarahMathsAstro]

Thank you, Luke!

[@Deliverator80]

I only just grabbed my license for PI yesterday. I had seen and heard about the wizardry of pixel math before, but didn't full grasp it's power until this morning when I started to do star reduction. I'm a OSC shooter right now, but this video was helpful in a lot of ways, the algorithm did me a solid today. Great video, subbed!

[@SarahMathsAstro]

The wizardy of Pixelmath is indeed, powerful - I'm excited that you got a PI license and that you found this video helpful still, too. Thank you for subscribing!

[@JasonDiMichele]

Mind blown! Beautiful image. Getting back into astrophotography myself and doing some research to determine if I go the colour vs mono camera route. These results are just epic and I'm leaning towards the mono even though the processing overhead is a lot more (but I'm sure quicker when you're not giving a tutorial). Thanks for your time on this video! :)

[@SarahMathsAstro]

Thank you so much, Jason! I'll always be an advocate for monochrome cameras, especially in heavily light polluted skies such as the ones I primarily image through. Although, OSC with a dual or tribandpass are solid options as well. So excited for you and you jumping back into astro! Wishing you clear skies!

[@JasonDiMichele]

@@SarahMathsAstro I'll be doing a lot of my imaging in Southern Ontario so will also have a fair amount of light pollution in most areas. But aside from being able to eliminate certain light ranges, the high quality tonality between the gradient/colour shifts using the monochrome sensors really appeals to me. Especially since I like to print my photography large! I'm excited there are so many high quality dedicated cooling astro cams available these days! :) I've subscribed to your channel and I look forward to learning and sharing (as I get into it deeper). Have you thought of making courses or guides on the mono image processing using PixInsight? I understand a lot of the terminology and techniques from my regular photo processing but there's so much new and dedicated techniques and info for the mono imaging. My nerd brain got super excited and fired up watching your process! lol Cheers!

[@SarahMathsAstro]

Those are also all great reasons! I hope you end up finding the perfect one for you and I look forward to hearing how it all goes! Thank you for subscribing and for your support as well! I've considered making courses/ guides but that may have to be further down the road. I definitely nerd out with all of this stuff too and it makes me happy to hear that others do as well. There's always so much to learn in astrophotography and that's one of the reasons I love it. Cheers and clear skies!

[@psuaero100]

Great video and technique... I'm definitely going to go back and re-do an image following your flow.

[@SarahMathsAstro]

Thanks! I'd love to see it if you want to share it when you do. -Sarah

[@PaulymanAstro]

Wow, great work Sarah, the final image looks amazing. I have only just seen this video now, we had our second child right around the time you posted the video so I have been preoccupied. I appreciate the shout out.

[@SarahMathsAstro]

Thank you, Pauly! Your kind words mean so much (no apologies necessary at all!). Congratulations to you and your family on the new arrival as well :) Thank you so much for creating such wonderful content and for being an awesome member of the astro community. I hope your year is off to a great start. Cheers!

[@JimBazsika]

Very informative, learned heaps from you. Thank you so much from New Zealand!

[@SarahMathsAstro]

I’m very happy to hear that! Cheers :)

[@simonpepper5053]

Hi Sarah I love a new Astro YT channel. Come across foraxx before and was pleased with the results, however your walkthrough was different including all the math which is great. Will try this out. New sub here! Thanks

[@SarahMathsAstro]

Hi Simon, thanks for stopping by and thank you for subscribing! I hope to hear how your images turn out with these expressions. Cheers!

[@stephen.and.the.huskies3741]

Great workflow! Thanks so much!

[@SarahMathsAstro]

Glad you found it helpful! Thanks for watching 😃

[@sambuddhasamanta9885]

Very informative and useful. Thank you so much Ma'am

[@SarahMathsAstro]

Thank you for stopping by! I'm glad it was helpful!

[@RigoFromSpain]

Well done Sarah !!!

[@SarahMathsAstro]

Thank you so much!!

[@figzastro-photography]

Nice work flow. Great picture.

[@SarahMathsAstro]

Thank you so much :]

[@rickpaul9858]

Great video

[@SarahMathsAstro]

Thank you, Rick!

[@mirkotondinelli8526]

beautiful image and coming out of the processing. I also came across the Forex method where you create a HOO image and a SHO and then average between the two ... interesting method which produces a very nice Hubble image to look at

[@SarahMathsAstro]

Thank you, Mirko. I really enjoy using ForaxX expressions.

[@canon1shot]

Hoping this comes across as helpful critique, I'm trying to learn all of this. The video started out really helpful but then the sound dropped and you blew through a hundred curves adjustments without saying the how or why, what you were trying to get to, a lot of beginners dont know why you are doing something and when we try to apply it to our images things look bad very quick but we've not learned how to correct it. If you could give us a little why and how, instead of "i'm just gonna apply a little of...". Maybe it could be "i'm going to apply a curves transformation to bring out blue, or to bring up luminance in this channel so here's how I'm doing it. Same as how you explained setting the histogram for each channel to the same levels, that came across very well and was explained as you were going. Thanks for the tutorials and I hope they are all as informative.

[@SarahMathsAstro]

Hey Butch, thank you for reaching out and for the feedback. I appreciate you taking the time to watch the video and for also taking the time to provide your insight. I apologize for the audio. I've corrected the issue in my video editing software (I was a bit newer to video production back when this video came out and have learned a lot since). I also am a huge proponent for explaining "the why" not just the "how to" and I hope I've taken that approach in my newer processing videos. This was very helpful, and again, thank you. I am always open to constructive criticism like this. If you have any other ideas/ input, about this video, or others, I'm all ears. Cheers!

[@Mike-1000]

I like the purpley look in your eyes.

[@SarahMathsAstro]

Thanks!

[@Mike-1000]

@@SarahMathsAstro Great vids too of course :)

[@dereksmith4517]

Grate vid.

[@SarahMathsAstro]

Thank you!

[@TheNocturnalArtVlogs]

Loved this tutorial, thanks for this Sarah! Might try implement the stacking process to my workflow 💫

[@SarahMathsAstro]

Thank you, friend! Your work always amazes me. You have such a creative eye and I’ve also loved seeing your drone work. Looking forward to more content from you!

[@TheNocturnalArtVlogs]

@@SarahMathsAstro thank you so much! Same goes to you, really looking forward to all your KZbin content ✨

[@ArthurDaire]

Just came across your channel. This is probably the best tutorial I have come across. I wish I knew ealier. Thank you. Is the OSC tutorial done yet? I just got a colour camera

[@SarahMathsAstro]

Thanks so much! I really appreciate the kind words. I haven't done the OSC tutorial yet. I got a OSC a few months ago myself! I hope you are enjoying it. Cheers!

[@DB2023Space]

Very nice Sarah thank you for providing this workflow. I am currently working with NB Tulip nebula data and will do an edit using your example here, with exception that I shot LRGB for the star set and want to blend that in for better color control in the final image. We'll see how that works 😀. You have a very pleasant voice but I lost you at 27:40. It did return to normal again at 34:52.

[@SarahMathsAstro]

Thank you, Dan and thanks for letting me know about the audio issue. I believe I have resolved it in my video editing software. I apologize for this issue! I would love to see how your Tulip Nebula turned out as well! I have data from that target I need to process too. Clear skies to you!

[@demisonlopes8620]

Tanks!

[@SarahMathsAstro]

Thank you!

[@phorr]

Thanks for sharing, very informative! Unfortunately it seems something went wrong with the audio, I can barely hear you in the second part

[@SarahMathsAstro]

Thanks for watching and thanks for letting me know. I think I know what happened and have hopefully fixed that in my next video I'm uploading. Cheers!

[@AlluminatorinRodeo]

I shoot OSC and this was the first video of yours that I have run across. The unfortunate loss of sound at 28 minutes was disappointing, but I love your process, and found some interesting ideas in how you used various PI tools.

[@SarahMathsAstro]

Thanks for stopping by, Vincent and for the feedback - I'm glad this tutorial still had benefit to your OSC workflow. I also apologize for the audio issues around the 28-minute mark. I believe I have corrected the issue and will no longer have that in my videos going forward. I hope to do OSC tutorials soon as well! Cheers

[@arcadium86]

Good job Sara! Can we consider this video the continuation of the mono camera pre workflow video you just released?

[@SarahMathsAstro]

Thank you! Yes, you're spot on.

[@JonnyBravo0311]

OK... those pixel math expressions were pretty slick... I'm definitely going to have to try them out on some of my SHO data. I must be part of the controversy crew... since I don't always use DBE, either - especially on NB data where the nebulosity is taking up pretty much the entire frame. Some feedback... 1. This is on the video itself, not on the processing. Around the 29 minute mark your audio becomes exceptionally quiet. It doesn't come back to normal volume levels until around the 34 minute mark. When it does, it's a bit delayed (i.e. I watched you click processes, but didn't hear the mouse click until a second or two later). That delayed audio only lasts until the next cut, then everything goes back to normal. 2. I noticed at the end you just did a quick combination of your stars as .33(s_stars+h_stars+o_stars). Have you tried playing around with that expression? I like to tweak the star colors as well using expressions like R/K: 0.8*s_stars + 0.2*h_stars, G: 0.2*h_stars + 0.8*o_stars, B: 0.95*o_stars + 0.05*h_stars. Then, I combine the new color star image with the starless. This, of course, assumes I didn't also get a dataset of RGB stars ... in which case, I'd use those in lieu of the NB stars. 3. Nice use of masks and curves. You've got a good eye and brought out a lot of the subtle details. Oh, and never apologize for the green! 😜

[@SarahMathsAstro]

Thank you so much for watching this video and for providing such thoughtful and helpful feedback!! I’m glad to hear it’s not just me who doesn’t use DBE for NB data all of the time and I’m excited to hear how your images turn out with some of these expressions! 1. Thank you for this and I apologize about the audio on those parts. Not entirely sure what happened but I’m looking into it. 2. I’ve actually been looking for an expression for stars like the one you just mentioned - thank you!! I’ve been trying to get better with stars and have been starting to do RGB stars but I’ve always wanted to use my NB stars in the way that you described so thank you times a million. Can’t wait to try this! 3. Thank you for the kind words. I’m still learning to master masks. I’m also glad that the blown out green wasn’t cause for concern 😃 I just don’t like that I blew it out but I’ll do better the next time. Thank you again!!!

[@SarahMathsAstro]

@@hollandayyyse you are correct! Narrowband filters will cut out a significant amount of light pollution gradients.

[@charliewatts6895]

One thing I found is that ABE actually works pretty good on nebula which take up most of the image. I don't use DBE but rather ABE (automatic background extraction).

[@arcadium86]

Can you take in consideration a tutorial on how to remove gradients when imaging from cities? Even in narrowband I can’t avoid gradients with 5nm filters…. :( …. Thanks again for ur amazing tutorials

[@SarahMathsAstro]

I need to do that, for sure. I struggle with gradients still, particularly with targets where the nebula doesn't fill up the entire FOV. Thanks for the recommendation and kind words!

[@daveincanada4794]

Great tutorial Sarah! However your audio drops out during the Masked Stretch chapter (27:18 to 34:50). There are some important instructions and descriptions there so I'm hoping you can get in there and add the audio back in.

[@SarahMathsAstro]

Hi Dave, thank you for the kind words and for letting me know. I'm not sure what happened to the audio there but I tried to replace it but haven't been able to.

[@Gliderlall]

Good stuff. Not sure if I'm right, but maybe it would be easier to drag the STF properties to the HistogramTransformation to reduce the amount of stretching repetitions (around 10:15)?

[@SarahMathsAstro]

You can do that, but in order to make sure that the histogram values are the same from all three narrowband images, I like to stretch them with HistogramTransformation to make sure they are all the same before I color combine. Otherwise you can end up with one image dominating the others in the final image (I.e., one color could be overly pronounced in the final image). Just my personal preference for color combining though.

I wish i didn't need to use DBE.. :) I just replaced my DSLR with a 533MM so most of the gradients due to the optical system will disappear (well, it wont hit the sensor, we can pretend its not there :)). Great image, I really like the color palette. I'm starting to get a bit bored by the standard SHO.. And I don't even shoot any NB myself yet. What brand of filters are you using?

[@SarahMathsAstro]

Yeah, I wish I didn't have to use it either most of the time but sounds like you made a good move. Thank you for the kind words as well. I use Chroma NB filters and ZWO broadband filters in my filter wheel.

[@sadeaton]

If you look close enough, low center right you can just barely see Thanos hanging out on his floating space recliner.

[@SarahMathsAstro]

Ha, you're right!

[@sadeaton]

@@SarahMathsAstro I would have felt so embarrassed if you had no idea what I was speaking of.

[@DamianVines]

Very nice work, good tutorial thank you :) What's the advantage to so many iterative stretches as apposed to 2 or 3 to get to the same numbers? Also along those same lines, I always struggle with just how much to stretch... Are their general rules of thumb for values, for instance do you always shoot for the 0.15 median value?

[@SarahMathsAstro]

Thank you, Damian! It really just depends on the data that you're working, with at least that's what I've found in my experience. I've had some data where you can do some quick stretches and it's fine, but with this data, I had to be a bit more "precise." Also, I find stretching Ha data to be much easier than Oiii and Sii data - those I have the most trouble with. But to be honest, I now stretch my data using the Generalized Hyperbolic Stretch script which tends to only need 2-4 stretches and makes stretching far better and more consistent. I highly recommend it. As for how much to stretch, I generally try to get to a value where the highlights are still a little under-pronounced (I don't have an exact median value), mostly because when I add in a Luminance image to the color image, it won't blow out the highlights that way and will keep great contrast. Overall, it's a bit of trial and error for each data set I work with. I'm not sure if this all helps, lol but I hope so. Thanks for the great questions!! Cheers!

[@DamianVines]

@@SarahMathsAstro Thank you so much Sarah :) I'm just now playing with GHS, unfortunately all the tutorials and documentation I can find are for the Script version 2.2.4 which is quite different than Process version 3.0.0 currently in PI. The interface and windows are quite different, having a hard time figuring it out from the available videos, seems promising though

[@SarahMathsAstro]

@@DamianVines Awesome! :) I'm glad you're trying it out, too. I haven't had a chance to update it to 3.0.0 but will look into this.

[@mickwhitaker4086]

Sarah, could this workflow be done with one shot colour dual narrowband images by splitting the channels and adding a luminous channel??

[@SarahMathsAstro]

Mick, great question. I think it could be possible, so long as the background values of all the images you end up combining in the Forax expression have the same median value. So I would imagine that after you've split the channels you could do some HistogramTransformation on the images or the Generalized Hyperbolic Stretch script to match the histogram values to one of the channels and then creating the dynamic expressions of 'o' and 'ho' should be fairly straight forward after that I think. If you give it a try, would you mind letting me know how it goes? I'll try to give it a try here soon, too.

[@jacksonfroman2048]

I like following other’s work. It’s really frustrating when starting in on images that didn’t turn out well. But I have some good ones from last month. It’s been so humid and cloudy here last couple of weeks

[@SarahMathsAstro]

I understand that completely and I'm glad you have some solid data to process. I hope the weather clears up for you soon here!

[@jacksonfroman2048]

Got the new camera out tonight. Only had Ha filter, but the rest is coming Thursday. So stoked. Didn’t have power for the cooling even. But got focus and guiding. Two hours of sky. I had the coffee goin.

[@jacksonfroman2048]

It's cool that I can tell someone who is into astronomy about this, bc it's a big deal and not many understand (non astronomy ppl), switching from DSLR to Mono. I only have Ha, OIII, and SII. I didn't get the LRGB filters. I guess it's ok to practice first, someone said to get the narrowband filters first, and get used to those.

[@aashaykadu6549]

Will you do a tutorial on Hubble data?

[@SarahMathsAstro]

I'll add that to the list!

[@ianbost193]

It seems like you're going really fast at the end. I can't follow what/why you're doing things. Otherwise great video - very helpful!

[@SarahMathsAstro]

Thank you for taking the time to watch the video and thank you for providing feedback. It's very helpful and I appreciate it! I do apologize for going faster towards the end of this video. I've tried to slow things down in my more recent videos. Thanks again and clear skies! -Sarah

[@rvoykin]

When I tried to create “O” it says ***Error: invalid symbol identifier : Oiii^~Oiii Any ideas?

[@SarahMathsAstro]

It could be that one of the images had an identifier that didn't match. Everything is case sensitive. That's my first guess based on the info here.

[@bucolic9343]

Just out of curiosity where did you learn all of these

[@SarahMathsAstro]

I learned a the one in this video from another KZbinr, Paulyman Astro and have also created a few myself.