With the 25-50x wide-angle eyepiece, you can enjoy viewing comfort across the entire magnification range. With a weight of only 295 g / 10.4 oz and a unique optical system with an aspherical lens for an edge-to-edge viewing experience in sharp detail, this eyepiece is also excellent for digiscoping. Be prepared for any activity in any weather with lightweight, precision eyepieces from SWAROVSKI OPTIK. All of the eyepieces are watertight, compatible with the CTS and spotting scopes in the ATS/STS range, and can be quietly and simply changed at any time. A protective glass prevents dirt getting into the device, even when the eyepiece has been removed.