Hottest thing from Swarovski! Fully compatible with all versions of their ATX and STX spotting scope systems, Swarovski Optik's BTX 30x/35x Eyepiece Module represents incredible comfort for long-duration glassing sessions. The innovative design replaces the conventional single eyepiece with a dual-eyepiece binocular configuration that enables users to view with both eyes open, and with the eyepieces set at a 45° angle to the optical tube, their head is put in a natural viewing position.

This module requires an "Objective" module for the front end: choose from 65mm, 85mm or 95mm diameter objective lens (bigger is brighter and heavier). See choices below.

• High-definition (HD) fluoride glass lenses eliminate chromatic aberrations for accurate color fidelity, and improved resolution and contrast
• Field-flattener lenses correct spherical aberrations for distortion-free views, especially at the edges
  
• Provides comfortable both-eyes-open viewing, with reduced, fatigue during long-duration observation sessions
• Forehead rest improves viewing stability, is adjustable for optimal eye relief and viewing comfort, and is removable if preferred
• Waterproof
• 30x magnification with 65mm/85mm objective models; 35x magnification with 95mm model
• Weight: 3.1 pounds