And by serious, I mean I had my tripod and cable release handy. Both of the below shot with my 17-85mm f/4-5.6. C&C encouraged. View On Black Pano. 2 images together, 4 min exposure each at f/5.6, ISO 100. (The second shot quickly became a hassle; my first battery in the camera died, so I had to take it off the tripod, put in the second battery I bought just yesterday, and recompose...bah.) View On Black 2 min exposure, f/5.6, ISO 100, plus the 580EX II that I had on me at the time (never leave home without a flash kids). Flash was gelled with a full CTO; ambient light from the UBC campus (sky) and a bonfire (lighting from the front right). Far left, toward the left side of the tower: 3 flashes, at 1/8 power, 0º, 45º, and 80º from base. Left of camera: 2 flashes at 1/8 power at 60º from base, 1 at 80º at 1/8 power. To camera right, straith at the left side of the tower: 2 flashes, 0º. Sure, I was only using the flash to fill in shadows, but it worked. And it was kinda fun running around with my flash.