What did I get?

[BF Hammer]

From a personal perspective, a focus point for this style of photography is irrelevant to taking the photos. Metering exposure is manual and focus is also. I do make use of a focus point to zoom in the live view on a star when I do the focusing. I also center the focus point and use that as my target as I polar-align my tracker.

But focus point plays no function of my taking photos or post processing astronomy subjects.

 

[blackstar]

Well, I think you misunderstood my stating of "fix the focusing point." What I meant was to lock the focus. AW, time to experiment again.