There are many kinds of geeks, and they were all on display at D*C. Part of the fun of this con is all the costumes and taking pictures of them all. This, of course, leads to lots and lots of cameras.
I felt silly with my battery grip and flash, but some folks had no such trouble. There were softboxes, Lightspheres, monopods, L-glass, you name it.
Among the pockets of X-Men and Whovians comparing costume design were groups of photographers comparing glass and flashes.