This is my favorite shot from an urban trip with Theory-3 media.  For a while I struggled to find a good angle to make an interesting shot.  There was nothing on either side of the rail to use for composition and I was disappointed with the shots.  Then I decided to get right up against a wall in front if the rail….. looking better.  After a couple of shots like that it still needed something extra.  I grabbed a red gel and fitted it to my Canon 580EX flash and put it on top of my camera pointing left at the wall.  I plugged my pocketwizard trigger into the PC socket on the side of the camera and BAM there it was.  This other shot shows what the rail and the surroundings looked like.

Strobist info:

Shot with a Canon 1DMKIIN 1/250th f5.0 70mm on a 70-200 2.8L IS.  Lighting was from 3 sources.  On camera flash with red gel pointing at the wall.  Elinchrom Ranger at full power about 10ft to camera right and 2 vivitar 285s on full power at the top of the rail just off to the left hidden by the wall.