One of the most useful tools I have found for my outdoor photography is a radio remote triggering device for firing flashes and my camera.
These can be useful to fire a flash that is far from the camera but also will trigger the camera to fire from a remote location. The uses are unlimited and can be used for just about any subject depending on your imagination.
The radio remote device have a sender and receiver although some are transceivers and will work as both as the sender or receiver. The sender attaches to your camera and the receiver to your flash.
Maybe you are wondering about the Infra Red triggers that are available by the manufacturers for firing flash? These are nice but have more limitations than a radio remote. The distance the IR is effective is much shorter than the radio devices and the line-of-sight between flash and sender can be an issue. Often if anything obstructs the line-of-sight between the devices the flash wont fire. You may have trouble as well if you are trying to hide the flash and receiver around a corner or maybe even in tent. If anything obstructs the signal the flash wont fire. The IR trigger also won’t fire the camera. Here is how I use them.