The Smartphone Digi-scoping Adapter allows one to attach his/her smartphone to a variety of optical products then use the phone's camera to take pictures and movies or simply view a distant object. There are two main types of adapters. One is a two-piece, the phone case and eyepiece adapter being detachable, which makes it easy to slip into your pocket. The other type a one-piece, which means it isn't as portable, but it is more adjustable.