Magview SYNC Self-Centering Disc Accessory S1 Standard Size. Simply align the SYNC Plate on your phone with the provided alignment tool connect to your spotting scope and SYNC takes care of the restso youre always ready to capture the moment. Features: Designed and made in specialized factories. Backward compatible to our original S1 or S1 mini spotting scope adapters. Not compatible with our B1 or B1 xl binocular adapters. Magview 82052 S1 Sync Self Centering Disc Accessory Magview 82052: SYNC Self-Centering Disc Accessory S1 Standard Size