The shots were taken without moving the camera, so they show the actual relative position of the sun for each shot. The shots were combined in Photoshop using layers with "Lighter color" blending.
Local time, top to bottom: 18:25:07, 18:26:31, 18:28:23, 18:30:43, 18:33:03, 18:34:55, 18:36:19.