Processing. I took 5 images (-2, -1, 0, 1, 2) processed a LR HDR image then took the 6 images as stacks into PS and then used smart objects to do a mean of those 6 images. Then I used MacPhun Intensify Pro to finish it off. That is where the halo came from. I tried to minimize it the best I could, but couldn't get it all.