Orion 51514 Smartphone Holder for Binoculars Lightweight mounting bracket positions a smartphone in just the right place on binoculars for easy reference while stargazing When used with a smartphone running a dynamic star chart app, it's like having a personal tour guide to the cosmos! Works with virtually any size binocular equipped with a 1/4"-20 tripod adapter port Fits virtually any size smartphone, even when encased in a protective bumper