Great tutorial, very clear and helpful!

@stefan_astro

Жыл бұрын

Thank you!

Such a life saver ! Thank you !

@stefan_astro

10 ай бұрын

Glad you found it useful! - Stefan

This is really helpful. Thank you!

@stefan_astro

Жыл бұрын

Glad it was helpful!

Thanks for your tutorial! I am a newbie in Siril, and this video was very helpfull in stacking my narrowband images.

@stefan_astro

7 ай бұрын

Glad you found it useful!

You can clean your dust spots like open the sensor protective glass and blow the dust from your sensor. I do this from time to time and works just fine for me.

@stefan_astro

7 ай бұрын

I have done so since. Made a massive difference indeed. Was really quite scary tho😅 - Stefan

Thanks a lot! It helped!

@stefan_astro

10 ай бұрын

Glad it helped!

I'm new to Siril, so this was a big help. Thanks. I have a question though. Why didn't your flats remove the dust motes?

@stefan_astro

8 ай бұрын

Glad the video helped you out! Good question about the flats. I suspect that it had to do with some sort of dew or something on the sensor which didn't stay in the same place between imaging and the taking of the flats. However I'm not sure. Luckily since I cleaned the sensor the problem is absent. - Stefan

Great job bro 🤗

@stefan_astro

Жыл бұрын

Thank you!

Thanks for showing your process Stefan. I appreciate that you showed all your steps for Siril to calibrate from raw images. Is there a reason you are not using the Mono-preprocessing script? For myself, I have my calibration images in a folder and use windows subsystem for linux as provides an easy method to make soft-links (saving disk space) and can script the creation of the links from my calibration directory to a new structure in my working directory, depending on the filters I am using (LRGB or HOS). Starting in my desired working directory, I call Siril from the command-line and give it the directory and the mono-preprocessing script. This creates a processing folder with all pre-processing, registered, and a stacked image at my main level. The RGB composting button has the ability to 'align' the images so I just use that. However I like your technique of creating a sequence for LRGB images and letting Siril do the registration as this can be scripted. Everything from here is post-processing and similar to your technique [BGE, PCC, image solve if needed, Starnet, image solve if needed, star recombination, GHS, color saturation, export to png.

@stefan_astro

Жыл бұрын

Thank you for your comment! There most certainly is a reason I stack manually. Because when stacking manually you have a lot more settings to play around with leading to a better end result. As I have tested in this video: kzread.info/dash/bejne/h6ZrscOzm8qYoag.html But indeed stacking using scripts is a lot faster. Which is why I use them if I just want to have a quick look at what the data is like. - Stefan

@sbklb1

Жыл бұрын

@@stefan_astro I did have to modify my process to use some of your techniques. in particular, the method of loading all the result finals for each filter and creating a sequence, aligning/registering (2-pass, then apply reg in latest version), is great as enables LRGBHOS starnet images to be managed.

@stefan_astro

Жыл бұрын

Glad you found it usefull! I do believe running starnet on a sequence can give some pretty amazing results and I myself will probably be using it quite a bit aswell. - Stefan

Thank you for this nice tutorial. It will improve my images a lot, even tho I prefer GIMP ^_^

@stefan_astro

10 ай бұрын

Glad you found it useful! Gimp is definitely a great program. Have used it a lot in the past as well.

@komivalentine3067

10 ай бұрын

@@stefan_astro Yes, Gimp is great but I need to improve my workflow. Right now I stack in DeepSkyStacker for the (LRGB-HA) and combine the channels in GIMP manually. It's a total pain with the chromatic abberation and the weird lens distortion tool. Rotation is also an issue. On top of that, I always feel like I'm losing a lot of data trying to adjust the curves for the color values. 32bit image, the histogram is like a 1 pixel wide line. There is no option to zoom in on that, so it's really painful to get it right and requires a lot of iteration ^^ Not saying it's not possible, but I want something more straight forward and this seems way nicer :)

Nice video. Are Siril able to combine light frames with different exposures ?

@stefan_astro

Жыл бұрын

Thank you! Yeah Siril is able to combine all sorts of datasets. Even from completely different setups. The only thing you have to think about is that you calibrate each dataset seperately. - Stefan

@One1Raptor

Жыл бұрын

@@stefan_astro Thank you! I'm completly new to Siril. I have a stack of 2 and 3 min light fram i would like to combine. I should then follow all the steps for both the 2 min stack as well as the 3 min stack? How would you suggest afterwards? Thanks

@One1Raptor

Жыл бұрын

@@stefan_astro I dont have the pre-prossing tab ? Version 2.1.0

@stefan_astro

Жыл бұрын

So first calibrate all of your lights in 2 seperate folders, one for 2 min and one for 3 min (so darks, flats and bias (if you miss any of these don't worry about it to much)). Then Siril will give you pp_lights_x.fits with x being some number. Which you put in to the conversion again to create a new sequence. After which you can register the images and stack them. Concerning the preprocessing tab being gone, I believe they changed the name to calibration. Hope this helps! - Stefan

The dust motes weren't removed at all, as if you didn't even use flat frames, so what's up with that? BTW I have way more dust motes and even a speck from a peeled off filter right on the camera protection glass which appears as a deep black huge mote in subs - but it completely gets removed with APP. Also, this is way to many steps for each filter etc. Again, in APP you dump all files of all filters at once, and then APP intelligently discerns which ones are for which filter, so you do not have to do the same 5 or so steps for every filter. I know, APP costs money, and this is free I guess, but still - if the result which is supposed to be a calibrated image does not actually get calibrated, then what's the point?

@stefan_astro

Ай бұрын

Indeed the main advantage of software like Siril is that its free. Which is amazing if you are a beginner. APP is an amazing piece software, however for me it is not worth the money at the moment. About the dust modes, I was struggling with so much dust on the glass Infront of the sensor that is started moving when the telescope moved. This made it impossible to properly calibrate out. Cleaning the piece of glass resolved the issue. - Stefan

I am using Siril 1.2.1. I follow carefully along step by step. When I get to the registration tab on my first set of light frames (at the 13:00 mark of your video), the "go register" button is disabled (grayed out) and there is a red warning message "debayer the sequence for registration". This is monochrome data from a QHY 268M camera. What am I missing or doing wrong? Thanks.

@stefan_astro

4 ай бұрын

I have no clue to be honest. But you could start by trying to pinpoint the problem. For example by first slipping calibration and then see if you can register the frames. After that I think it would be best to make a post on the Siril discussion forum. Hope you figure it out, Stefan

@pdc023

4 ай бұрын

@@stefan_astro We did figure it out. There is a setting on the APT camera selection tab for "Color FITS Preview (de-bayer)". I had the box checked (because I had previously been using an OSC camera) and this caused APT to insert a Bayer pattern entry into the FITS file header causing Siril to interpret the files as RGB. Unchecking the box corrected the error and Siril now recognizes the files as being monochrome. Thank you for getting back to me.

Hi Stefan Can you confirm that your tutorial Lrgb can also be used for s h o ?

@stefan_astro

Жыл бұрын

Hi Ross. It sure can. The process of preprocessing is the exact same. Although it should be noted that the processing of the combined SHO image will be different. Mostly because balancing the different narrowband images is rather difficult. If you want I could make a tutorial about the combination. (I will just need to get my hands on a SHO dataset as I don't own all 3 filters myself) - Stefan

@rossgould4168

Жыл бұрын

That would be great thanks Stefan !

@rossgould4168

Жыл бұрын

Got a SHO image of the Elephant trunk nebula using your excellent tutorial Stephan. If you want I can e mail you the image if you want?

@stefan_astro

Жыл бұрын

That would be great! Will it than be ok if I use it in the SHO video? E-mail: stefan.astrophoto@gmail.com

@rossgould4168

11 ай бұрын

@@stefan_astrosorry just read

stefan, my siri says stacking failed. what should i do?

@stefan_astro

8 ай бұрын

There is a lot of things that could be wrong, but I would suggest you start by looking at the error message. Often Siril will just tell you what is wrong. If that doesn't help, reinstalling Siril often does the trick. Hope it helps. - Stefan

@swayamtirlotkar9377

8 ай бұрын

@@stefan_astro yeah, later I realised i need to first register those images so i can stack them. It worked. Keep making such videos 😄

400 🎉

@stefan_astro

Жыл бұрын

Yes sir!