A learning curve, for sure. This mosaic / panorama is 120 images, 4 shots each from 30 camera positions. Each image has been stacked on top of each other and aligned to mean out some of the noise of shooting ISO 1600 for 30 seconds each shot. It took well over an hour to shoot the 30 camera positions – 4 shots, move, shoot 4 shots, etc., including shots I dod not use at the edges for overlap. As I was operating and moving the camera those wispy clouds were moving though the scene, which added quite a wrinkle to processing.
After stacking the images I stitched 30 of the composites into this image with AutoPano Giga, then processed in Lightroom to edit for color, brightness, and noise.
I made this with my little Canon M6 with the EFM 22 f/2 lens @ f2.8 for 30 seconds each frame, ISO 1600. The camera mounted to a Pano / Nodal head atop a Vixen Polarie star tracker which points at the north star and rotates at the same speed as the stars. The full size, original image is 10,343 pixels wide x 12,929 pixels tall.