Universal smartphone eyepiece adapter (fits 23–50 mm) Capture clear photos through binoculars, telescopes and microscopes while keeping your phone protected. Key benefits Photographs through eyepieces: Designed to let you take pictures and record video using your smartphone mounted to binoculars, telescopes or microscopes. Broad compatibility: Fits eyepieces with diameters from 23 mm to 50 mm, covering most common binocular, telescope and microscope oculars. Device protection: Holds and shields your phone from direct contact with the instrument eyepiece, reducing the risk of scratches or impact damage. Practical solution: Eliminates the need to hold your phone by hand against the eyepiece, improving alignment and helping produce more usable images. What it does Enables smartphone imaging through optical eyepieces so you can document observations with devices you already own. Works with a wide range of optical instruments: binoculars for fieldwork, telescopes for astronomy, and microscopes for lab or classroom use. Typical use scenarios Birdwatching and wildlife observation: Photograph distant subjects through binoculars while in the field. Amateur astronomy: Capture the Moon, planets, and other celestial objects through a telescope eyepiece. Education and lab work: Record microscope slides for teaching, documentation, or remote sharing. Compatibility and sizing Eyepiece diameter supported: 23–50 mm. Suitable instruments: binoculars, telescopes, microscopes. Tone and reliability Simple, functional design focused on making smartphone imaging through eyepieces practical and protecting your phone during use.