Great tutorial Jeff. I'm going to apply this to my capture last night of Sh2-101. I think that I have a back focus issue that is giving me curled stars around the perimeter of the image.👍🏾
Great walk through! I thought asinh is pronounced "arc-sign" its a trigonometric function. The H is for hyperbolic, but in this context most people don't mention it.
Math wasn't one of my better subject in school as you could tell... ;-) I never would have gotten that from the spelling alone. Glad you enjoyed the video.
Hi, Excellent video and did fallow your way but my stars look to perfect round shape kinda to fake Is a way I can have some blur to keep them more like glowing !
To counteract walking noise, you should dither the frames as you capture them, at least that's what I do; then you can run drizzle and the walking noise is gone.
Thanks, Tim I do dither every 5ish minutes or so. I don't like to do it much more than that as I only shoot any target for 90 minutes. For the image used in this video. It was supplied by a friend. It was a Live Stack made in Mallincamsky and that program can't dither. He does a lot of outreach and will save the final stack to an image he can start working on. The walking noise unfortunately is one of the side effects of the way he captures the data... I used this image as the stars were very bad and it worked well for this video.
It can’t be tilt as the elongation is in opposite directions, both corners pointing towards the middle, it would go the same way in the direction of the tilt, if it was tilt…. But good instructional video….👍🏻
Astro_Shed, I get collimation and tilt mixed every now and then... With Matt's RASA 8. He has a stuck collimation screw and I'm pretty sure that would be the culprit...
@@jeffrh it was the first image you showed in the video I was referring to, I should have said, it looked very much like a backspace issue from a flattener…
@@Astro_Shed That image was made with his C8 and a Starzonia reducer. I think the backfocus was off on that image which would give those stars pointing towards the center... Just a guess
@@adampedzimaz9164 Yes, I agree... only on one side are they like that... The right side. Something in the optical train is off to account for something like that.
Depending on how you stretch the stars back again. Some of that look will come back. Or you can use something like PhotoShop and the Astronomy Tools Actions and play with those. These are just a few examples, there are many more ways to do things like you ask... Good luck and claer skies...
Great information!!
I'm going to apply this on my next imaging session.
Thanks so much!!👍🏾👍🏾
Nice one Jeff I'll definitely check this out next image I process as I do have some tilt with my images using the RASA, thanks for the upload.
This workflow is for non-linear images only. I'll be making another video that will show my linear workflow for fixing stars with Siril... Stay tuned.
Amazing how simple it looks like. I am going to apply it on one picture, many thanks for your great job.
Take your time and learn the tools and what they and you like... Have fun!
Great tutorial Jeff. I'm going to apply this to my capture last night of Sh2-101.
I think that I have a back focus issue that is giving me curled stars around the perimeter of the image.👍🏾
I know that feeling... Back focus with fast scope needs to be spot on... ;-)
Great walk through! I thought asinh is pronounced "arc-sign" its a trigonometric function. The H is for hyperbolic, but in this context most people don't mention it.
Math wasn't one of my better subject in school as you could tell... ;-) I never would have gotten that from the spelling alone. Glad you enjoyed the video.
asinh = latin: arcus sinus hyperbolicus - pronouncing acronyms like a real word sounds often ... funny :)
Definitely will watch this one again and take some blow by blow notes. Thanks!
Remember, this video is for non-linear images. If you have linear data. Watch this video: ua-cam.com/video/ecnALupPH_A/v-deo.html
Hi,
Excellent video and did fallow your way but my stars look to perfect round shape kinda to fake
Is a way I can have some blur to keep them more like glowing !
To counteract walking noise, you should dither the frames as you capture them, at least that's what I do; then you can run drizzle and the walking noise is gone.
Thanks, Tim I do dither every 5ish minutes or so. I don't like to do it much more than that as I only shoot any target for 90 minutes. For the image used in this video. It was supplied by a friend. It was a Live Stack made in Mallincamsky and that program can't dither. He does a lot of outreach and will save the final stack to an image he can start working on. The walking noise unfortunately is one of the side effects of the way he captures the data... I used this image as the stars were very bad and it worked well for this video.
It can’t be tilt as the elongation is in opposite directions, both corners pointing towards the middle, it would go the same way in the direction of the tilt, if it was tilt….
But good instructional video….👍🏻
Astro_Shed, I get collimation and tilt mixed every now and then... With Matt's RASA 8. He has a stuck collimation screw and I'm pretty sure that would be the culprit...
@@jeffrh it was the first image you showed in the video I was referring to, I should have said, it looked very much like a backspace issue from a flattener…
@@Astro_Shed That image was made with his C8 and a Starzonia reducer. I think the backfocus was off on that image which would give those stars pointing towards the center... Just a guess
@@jeffrh Also, You can clearly see that image is out off focus - black holes inside the stars.
@@adampedzimaz9164 Yes, I agree... only on one side are they like that... The right side. Something in the optical train is off to account for something like that.
Excellent video
My question is how can I make Star more natural like we see under atmospheric conditions with bit sparks
Depending on how you stretch the stars back again. Some of that look will come back. Or you can use something like PhotoShop and the Astronomy Tools Actions and play with those. These are just a few examples, there are many more ways to do things like you ask... Good luck and claer skies...