In order to take those 6 shots, I took two sets of 3 shots, one centered at -1Ev (-1, -2, 0) and the other centered at +1Ev (+1, 0, +2), so I was essentially shooting and switching the setting nonstop. The first shot was taken at 6:38, the last one at 6:45.
I processed all the HDR pictures using 5 of the pictures from each set of 6, and I used my software of choice, Nik HDR Efex Pro. I then used Photoshop CS5 to arrange this collage...
