Ubertronix is a new company that manufactures devices that can take in sound, motion, lightning or laser as inputs to trigger a camera. They have developed the technology using sophisticated sensors to send a signal to the camera to take a picture at just the right moment. The device mounts onto the hot shoe and attaches to the camera via the remote switch port. When it senses lightning, it signals the camera to take a picture. Most camera shutter speeds last between 45-60ms, and the average lightning strike lasts about 100ms. You can set the camera on a tripod, walk away, and let the device do all the work, returning later only to find several lightning images on your camera. The company has added also other features to their devices that can trigger the camera based on sound, motion, laser or time lapse which will allow to take photographs of popping balloons or even a speeding bullet.
The Strike Finder is compatible with Canon, Nikon, Sony, Olympus and Pentax DSLR camera. Here are some examples: