Here is the course summary available in French and English:
 
1) Preprocessing and stacking photos using scripts
- Siril Download
- Uploading new scripts
- Creation of files
- Definition of the working directory
- Explanations of the uses of scripts
- Opening the result and stretching
 
2) Preprocessing and manual stacking of photos
- Creation of the master darks
- Creation of the master biases
- Calibration and creation of master flats
- Calibration, alignment, gradient extraction of lights
- FWHM selective sorting
- Final stacking
- Recovery of the final file
 
Have you heard of Siril but don't know how to use it yet? It's all on your camera or camera but you don't know how to do it? You don't yet know how to stack and preprocess your images? How to bring out the signal in your astrophotography to get the result you want? Then this lesson is for you! 
 
Thanks to its 30-minute explanatory videos and its PDF support to download for your next preprocessing, Siril reveals its secrets to you for fast, easy and effective preprocessing and stacking both with scripts and manually.
 
We first approach the preprocessing and automatic stacking of the M33 galaxy using the different scripts that Siril offers as well as others available on the www.free-astro.org platform. The scripts are numerous and allow you to do all kinds of stacking and preprocessing depending on whether you have done DOFS or not for example.
 
In the second section, we offer preprocessing and manual stacking of M33 for a more personalized and sometimes more efficient result. Indeed, we can thus have better control of our actions depending on the conditions in which the astrophotographies were captured.
 
A PDF summary of the procedure to follow is delivered to you to serve as a memory aid during your next pre-treatment at home and thus save valuable time.
 
Do you want to put all the chances on your side to bring out all the signal that you captured the night before on your camera, your astro camera or your Samsung S21 smartphone? Good pre-treatment will allow you to achieve better final quality and simplified processing. So take the step and become master of your astrophotography while simplifying your life?
 
Do you still have doubts about the lesson, its price or would you like personal advice about preprocessing and stacking in Siril? So leave us a message on our contact page or write to us directly at the email address contact@astrophotographieonline.com and we will be happy to read you, help you and pass on our knowledge to you.