The Hypercam 2inch nosepiece is precision machined with a straight sided barrel. This allows for more repeatable collimation in your 2" focuser or extension tube.
It's so stable, even long exposures are possible, thanks to a metal clamping mechanism for both eyepiece and phone body. Way better than cheap all-plastic smartphone adapters.
Dimensions: Fits eyepieces with outer diameter of 31mm to 55mm Minimum smartphone size: 101x53mm (LxW) Maximum smartphone size: 210x110mm (LxW)