Tripod mounted my EM1mk3 . using 40-150mm zoom lens at f/2.8, ISO 6400. 4sec exposure in M mode. First set zoom at 40 mm. and used Starry autofocus, centred Orion belt in the frame. Then pressed the shutter and slowly zoomed in to 150 mm during the 4 secs. That's it, nothing special. Tried lower ISO as well to keep the noise down. also tried a longer exposure time but that gives elongated stars.Love the second. Any details on how you took it.