Vixen (Vixen) field scope and large binoculars Accessories for Porta Multi-plate 38011-4 Review May 22, 2018November 4, 2018 - Conquerogue This Universal Plate is specifically designed for Vixen Porta Mount. When you attach this sturdy universal plate to the Vixen Porta Mount, it allows you to securely attach binoculars, spotting scopes, telescopes, and other accessories.