Allister’s comment

David had arranged approval to shoot inside the cathedral using our tripods. The interior was very impressive, and we focused on the ornate ceiling by shooting straight up for some square-on symmetry. I used a tripod and shot at 12mm on my 10-18mm lens, at f/9 for good sharpness. I also set a Custom white balance (see page 10) as the lighting was mixed, and, as light levels were low, I set ISO to 1600 to help brighten up the scene.