Fishing for lightning is one of my passions. To capture lightning I will use variable ND filter and adjust till I get an exposure of 1 second or longer. With the aid of a shutter release or intervalometer I capture as many frames as I can.

I will use a shutter release with my camera's drive mode on continuous or with and intervalometer
 set to an interval that will capture back to back frames. This shot was with my Canon 50D iso 400 exposure 3 seconds with and interval of 4 seconds. White balance is 4200k lens is a 18-55mm kit lens at f8.