1️⃣ 2️⃣
11- transfer all frames to a computer
12- use dedicated software to build the startrail. I used softwares like StartStaX, Startrails, etc... depending on whether you are on windows, mac or linux.
(13- submit it to APOD: https://apod.nasa.gov/apod/ap090314.html)
that's it.
So basically, it's 5-10 minutes preparation. Several hours to wait, 5-10 minutes to transfert all the frames to a computer, 5 minutes to process them. ⌚