The HookUpz??? Universal adapter connects any smart phone to any optical device in seconds. It is compatible with all popular phones (except Tablets, i.e Samsung Galaxy Note & iPhone 6 Plus) and nearly all optics (except rifle scopes). It fits any smartphone with or without a case (you can even use a charging case for hours of continual, uninterrupted use). The Universal adapter can be used on binoculars, monoculars, spotting scopes, telescopes, microscopes or night vision. Features a self-centering clamp with release grips that can hold optics over a very large range of diameters for all types of optics. Fits a wide range of optics with an outer eyepiece diameter of 20-58 mm. The releasable clamp allows you to let go of device and the optic is automatically in place at the perfect alignment. Phone alignment only needs to be done once initially, with two point alignment lock knobs. Has a single arm phone clamp for easy and quick installation and removal of phone during repeated use.