Swarovski STX Straight Eyepiece ModulesThe Swarovski STX straight ocular module can be paired with any of the ATX STX objective modules to form a complete spotting scope. This module contains a straight porro prism and a non removable zoom eyepiece. The eyepiece has a 25 60 zoom range on the 65 mm and 85 mm objective modules, and a 30 70x range on the 95 mm objective. The STX eyepiece module is nitrogen purged and fully waterproof. The zoom control is located at the front of the eyepiece