So lately I been taking lots of action frame by frame photos of the local skateboarders stuff like that. I also noticed that in a lot of the skate videos that the photographers can do frame by frames in the dark. I can't do this on my camera because it automatically disables the flash on frame by frame mode because it can't flash the flash quick enough. I was wondering what kind of external flash would snap the flash so fast simultaneouly so I could do fame by frames in the dark. And also where I could find it; if it would even work with my camera, a Nikon L100. I've been in photography for a few years but new to action/skateboarding photography. Thanks for the help.