Now I see Saltydog asked the photographer about the effects in the FB thread. DC replied that these are taken with a super wide-angle lens. ...so angles do get distorted.
Also, he wrote, "depending on how cold it is, I can get 2 sometimes 3 nightime shots per battery. Because I am stacking images, i am shooting anywhere between 90-250 images then stacking into a single once I get home and process it all"
I think that explains the intensity of the star tracks in the first picture.
