Thanks for the video! I am now starting to use ASTAP and the fact that you can just throw all your subs no matter what filter, exposure time, gain, same with different calibration frames it’s just amazing. Also that you get not only the RGB stack but also all the files in the results tab…Really nice stuff. Will do some reprocessing to compare.
What I especially love about this program is the analysis function. You can look at your sensor tilt just based on the star shapes and I use this as a collimation function for both my refactors and R/C scopes. That, and plate solving. Truth be told thats all I use it for, as I stack in Astro Pixel Processor.
I like ASTAP and owe you the credit for steering me to it. Though I have yet to advance to narrowband and dedicated cameras I will see if my flats and bias frames need to be temperature matched. I assumed since ASTAP is combining them for a faster flat and master dark flat that technically I just need a library per camera and for flats, per lens-aperture to characterize the lens behavior. And in ten years I have yet to have dust spots on any Olympus sensor so the flats only help reduce the amount of gradient work I have to do in post by flattening the light across the field of view. Am I incorrect in some of this? Thanks for all your work making some of the more arcane aspects easier to comprehend. 😅
Flats and Bias are typically much shorter exposures so they do not need to be temperature matched. I do try to take flats at higher shutter speeds to further minimize any temperature variances too. With Oly cameras dust on the sensor has never been an issue for me either.
@@TheNarrowbandChannel much appreciated. I have found your tips helpful and some of my older sessions are still useful now with newer software and techniques you describe.
This is a very interesting video. The more I'm discovering its functionalities the more I'm interested in ASTAP. However I don't understand something in your video, probably because my knowledge of this software is still limited: you never talk about exposure time: when you subtract darks to light matching gain and temperature, is matching exposure length not needed?
I like Astap I’m sure there’s more under the bonnet with Astap, and it can stack mosaic too , I’d like to know more on refining settings to get he best from your data , not sure why you had your flats at different gain it’s not required, noticed you never mentioned bias frames / Dark flats which are required for your flats .
I do actually use dark flats. I treat them such as to get them as close to being a bias frame as I can. Han the designer of ASTAP does not believe in Bias frames so that is why they are absent. Something I do wish he would change but hay it does a good job though.
Siril has potential but is is very hard to use and you cannot do any dark syncing. Or complicated projects unless you can write a script for it. I have asked the developers about how to write them and they did not give me an answer. Stacked result from SASTAP is generally cleaner and more noise free.
Thanks for your reply! I had the same experience with the Siril developers. I provided comet data for them to make a tutorial video … never heard back, never again answered my mails. Bad style … I will give ASTAP a try thanks to your video. Clear skies
I'm interested in this from a more, well, technical perspective, and it is all well and good, that astap is more versatile, when it comes to dark frames, and stuff like that, I understand the importance, yet I am curious, as to the actual stacking technique, regardless of the input data. Is there any difference between the two, when it comes to that?
The algorithm does appear to be superior. You might have to get on the ASTAP forums and ask Han in person. I can say that I an other you tubers founds in all cases that ASTAP creates cleaner more noise free images.
Hi sir. Can this concept be applied to multiple OSC sessions? In other words, If I shoot multiple nights at different exposure times and different temps, will ASTAP successfully stack all my subs and calibration frames? And if so, Is there a special setting I need to check? Or do I just upload everything and click "stack"? Thanks, Tommy
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Thanks for the video! I am now starting to use ASTAP and the fact that you can just throw all your subs no matter what filter, exposure time, gain, same with different calibration frames it’s just amazing. Also that you get not only the RGB stack but also all the files in the results tab…Really nice stuff. Will do some reprocessing to compare.
What I especially love about this program is the analysis function. You can look at your sensor tilt just based on the star shapes and I use this as a collimation function for both my refactors and R/C scopes. That, and plate solving. Truth be told thats all I use it for, as I stack in Astro Pixel Processor.
I like ASTAP and owe you the credit for steering me to it. Though I have yet to advance to narrowband and dedicated cameras I will see if my flats and bias frames need to be temperature matched. I assumed since ASTAP is combining them for a faster flat and master dark flat that technically I just need a library per camera and for flats, per lens-aperture to characterize the lens behavior. And in ten years I have yet to have dust spots on any Olympus sensor so the flats only help reduce the amount of gradient work I have to do in post by flattening the light across the field of view. Am I incorrect in some of this? Thanks for all your work making some of the more arcane aspects easier to comprehend. 😅
Flats and Bias are typically much shorter exposures so they do not need to be temperature matched. I do try to take flats at higher shutter speeds to further minimize any temperature variances too. With Oly cameras dust on the sensor has never been an issue for me either.
@@TheNarrowbandChannel much appreciated. I have found your tips helpful and some of my older sessions are still useful now with newer software and techniques you describe.
Good to know! Thanks for sharing and and will give it a try!
Thanks. It is laid out quite different but it is easy to get the hang of it.
This is a very interesting video. The more I'm discovering its functionalities the more I'm interested in ASTAP. However I don't understand something in your video, probably because my knowledge of this software is still limited: you never talk about exposure time: when you subtract darks to light matching gain and temperature, is matching exposure length not needed?
Thank you 🙏
I will try this one ASAP
Hope you like it!
I like Astap I’m sure there’s more under the bonnet with Astap, and it can stack mosaic too , I’d like to know more on refining settings to get he best from your data , not sure why you had your flats at different gain it’s not required, noticed you never mentioned bias frames / Dark flats which are required for your flats .
I do actually use dark flats. I treat them such as to get them as close to being a bias frame as I can. Han the designer of ASTAP does not believe in Bias frames so that is why they are absent. Something I do wish he would change but hay it does a good job though.
Thanks for yet another great video! How do you think ASTAP compares to Siril?
Siril has potential but is is very hard to use and you cannot do any dark syncing. Or complicated projects unless you can write a script for it. I have asked the developers about how to write them and they did not give me an answer.
Stacked result from SASTAP is generally cleaner and more noise free.
Thanks for your reply! I had the same experience with the Siril developers. I provided comet data for them to make a tutorial video … never heard back, never again answered my mails. Bad style … I will give ASTAP a try thanks to your video. Clear skies
I'm interested in this from a more, well, technical perspective, and it is all well and good, that astap is more versatile, when it comes to dark frames, and stuff like that, I understand the importance, yet I am curious, as to the actual stacking technique, regardless of the input data. Is there any difference between the two, when it comes to that?
The algorithm does appear to be superior. You might have to get on the ASTAP forums and ask Han in person. I can say that I an other you tubers founds in all cases that ASTAP creates cleaner more noise free images.
Hi sir. Can this concept be applied to multiple OSC sessions? In other words, If I shoot multiple nights at different exposure times and different temps, will ASTAP successfully stack all my subs and calibration frames? And if so, Is there a special setting I need to check? Or do I just upload everything and click "stack"?
Thanks,
Tommy
Yes is the simple answer. :)
There is a tool called "dark master" on sourceforge. This can sort the darks temps according to it's lights for DSS
I have actually heard of that one. Does it need to be compiled still to run?
Nice video about “AwsStop”. 😂
Thanks 😅