Juergen replied to the topic 'Ekos previews' in the forum. 2 months ago

If you are in focus at daytime you may have to correct the focus when photographing the stars, because at that big focal length 3km is not infinity. So if you saw some donuts: these should be the stars. Try to focus the donuts and you will see stars. Set the exposure time and gain that you can see the donuts.

Dont you have tracking on your 4se?