Pentax SMC XW 23mm Eyepiece for Spotting Scopes and Astronomical Telescopes (2")

Angle of View and Eye Relief: The 85-degree apparent angle of view and 20mm eye relief deliver an exciting wide-perspective image High-Grade Optics: The high-performance XW 23 optics incorporates high-refraction, extra-low-dispersion lanthanum glass elements to produce a well-balanced image with minimal aberrations Multi-Layer Coating: All lens surfaces that come in contact with air are treated with the Pentax-original multi-layer coating to deliver outstanding light transmission efficiency Advanced Light-Shielding Technology: The XW 23 features a light-shielding diaphragm at the most effective position to drastically reduce internal reflections for a brighter, higher-contrast image Weatherproof Construction: The XW 23 features JIS Class 4 weatherproof construction, making it possible to use it in drizzle or under night dew