With the Swarovski 25-50x wide-angle eyepiece, you can enjoy viewing comfort across the entire magnification range. With a weight of only 295g/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. This eyepiece is compatible with Swarovski spotting scopes in the ATS/STS range and can be quietly and easily changed at any time. Mfg: Swarovski