Last night I caught a few almost cloudless moments, and was able to collect first frames using TS130 refractor with 0.79x reducer. The proper distance to sensor has been adjusted, and here it is 50 minutes with M27 Dumbbell nebula:
Collected under about 5mag sky, 10×5 minutes with L filter, Atik 383, TS130 f/7 with 0.79x reducer.
Tests are done. Time to work 🙂