The iPhone is a pretty cool smartphone to use to capture photos and fun videos outdoors. It does not have night vision capability though. The good news is you can use a Night Optics iPhone Night Vision Adapter to capture high resolution photos and HD video through compatible night vision devices.
The Night Optics iPhone adapter was anodized with high grade aluminum. The base can be threaded directly into eyepiece by removing the eyepiece lens assembly. It only supports the iPhone 4s/5 though. Sets you back under $110.