Weye Feye is a device that connects your DSLR camera and lets you control it (using Wi-Fi) with your smartphone.
Using the smartphone app, which is available for Android and iOS, you can use the Weye Feye to control your camera from almost 600 feet away. You can adjust multiple camera options such as ISO, white balance, aperture and focus -- not to mention actually taking pictures. (Using the app will give you a 0.2-second lag on picture taking.)
The Weye Feye is compatible with several models of Nikon and Canon cameras.