Vanguard VEO BA-185 ARCA Binocular Adapter Black VEO BA-185 ARCA. This adapter helps to steady your binoculars for clear relaxed hands-free viewing. It works with any roof-prism binocular that has a standard 1/4" thread tripod socket and on most models its thin bridge allows you to set your binoculars to the minimum interpupillary distance. Arca-compatible base with a standard 1/4" thread hole for mounting Thin bridge and lightweight design but reliably sturdy Quickly attach or detach your binoculars in seconds Specifications for Vanguard Binocular Adapter: Manufacturer: Vanguard Color: Black Fabric/Material: Aluminum Features of Vanguard Binocular Adapter Material: Aluminum Package Contents: Vanguard Binocular Adapter Vanguard VEO BA-185 ARCA: VEO BA-185 ARCA Binocular Adapter Black