Eyepiece SMC Pentax XW 11/4" Tube 20

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Pentax XW Eyepieces XW 20 With unsurpassed optical clarity and offering a 70 degree field of view for comfortable viewing, PENTAX offers a wide selection of focal lengths with the XW eyepieces. They feature fully multi-coated lenses to increase light transmission and color quality, high-refraction lanthanum glass elements for high-resolution images with minimal aberrations, and JIS Class 4 weatherproof construction for durability. Engineered using advanced computer simulation design technology, this eyepieces also offer an unsurpassed 20mm of eye relief. Designed for use with a wide range of telescopes and PENTAX brand spotting scopes, the XW series eyepieces are a clear choice for ground and astronomical applications. Features: - 70 degree field of view for easier viewing - Fully multi-coated lenses increase light transmission and color quality - Advanced computer simulation design technology was used to drastically reduce internal reflections producing brighter, clearer images - Designed specifically provide ideal viewing conditions when used with a telescope - High-refraction, low-dispersion lanthanum glass elements deliver bright, high-resolution images with minimal aberrations and distortion - JIS Class 4 weather proof construction makes these eyepieces more durable Specifications: EYE RELIEF: 20mm EYEPIECE RING: Helicoid type WEIGHT: 12.6 oz. (355g)