Universal: This Cell Phone Adapter Compliable with microscope, telescope, binoculars, monocular and spotting scope. Fit eyepiece diameter 25mm-48mm(0.98"-1.89"). This adapter is fit for nearly most smartphones with a diameter between 52mm and 100mm(2.05"- 3.94"). You can get high-definition images by your mobile phone even if the object is far away from you Adjustable clamping force: The phone clamping part features adjustable locking mechanism with a steel bolt (not a spring). This unit can be mounted separately on any standard tripod (1/4-20). Smartphone is well protected by high-density EVA pads and nothing contacts your phone's screen. Safe & Comfortable Design: Fully metal housing and the main part was made of aluminum, phone clamp is made of high strength PA Plastic, keeping the phone free from scratch and damage. Strong structure to maintain good camera stability. Easy to install: Install your mobile phone on the holder and then adjustment the angle, make the image in the middle, then attach the adapter to a microscope, telescope or binoculars. Then you can get whatever you want to record. Get Your Mobile Phone Into Video Camera and Image Capturer in Distant, Tiny World . Explore the nature of the world easily through your screen.