If you've ever seen a breathtaking shot and felt a deep twinge of envy, the UK15 TriggerSmart Control Unit from Quantum Instruments is your solution. The controller recognizes sound, light, and infrared to fire your camera. The light intensity mode triggers the camera when the light changes dramatically. You can also tweak the sensitivity to suit your situation.

Sound mode triggers the camera when the controller detects a loud sound such as fireworks or thunder. This mode's sensitivity can also be adjusted to trigger your camera. Infrared mode fires the camera when the controller senses motion through its infrared beam