<p>This universal smartphone adapter lets you attach your phone to binoculars, monoculars, microscopes, telescopes, and spotting scopes for effortless digiscoping and adventure photography. The adjustable slot accommodates phone widths from 55 to 100 mm (2.17 to 3.93 inches), ensuring compatibility with virtually any smartphone model on the market. </p> <p>Crafted from durable black plastic with a non-slip soft rubber interior, the adapter protects your phone from scratches and keeps it securely in place during use. The circular knob enables quick clamping and release, while the rubber padding grips optical eyepieces firmly without causing damage. </p> <p>Ideal for birdwatchers, hikers, outdoor enthusiasts, and lab users, this portable holder allows you to capture high-magnification images and videos by simply aligning your phone camera with the eyepiece. Lightweight and compact, it fits easily into a pocket or camera bag for on-the-go use. </p>