Smartphone Binocular Adapter - Sports & Entertainment - AliExpress
Review: Snapzoom binocular adapter for smartphone cameras
Quick Connect Binocular Phone Adapter – SnakeLook
Amazon.com: GOSKY Smartphone Adapter Mount Regular Size - Compatible with Binoculars, Monoculars, Spotting Scopes, Telescope, Microscopes Fits almost all Smartphones on the Market Record Nature and The World : Electronics