CAPTURE ASTONISHING IMAGES - Use with telescopes, binoculars, spotting scopes, monoculars, and microscopes for versatile astrophotography and nature photography. UNIVERSAL COMPATIBILITY - Fits eyepieces from 1.14' (29mm) to 1.77' (45mm) using a thumb screw hex shape clamp, ensuring a secure fit for various optics. PRECISE PHONE ALIGNMENT - Features a thumb screw adjusting phone clamp style for easy and accurate smartphone positioning, optimizing image quality effortlessly. DURABLE METAL CONSTRUCTION - Crafted from cast metal, providing a robust and stable platform for your smartphone, ensuring long-lasting performance and reliability.