Pentax Weatherproof XW 20mm Extra Wide Eyepiece w/1.25in Barrel

Designed for use with PENTAX brand spotting scopes and with astronomical telescopes with appropriate 1 1/4" or 2" focusers. Ideal for both ground and astronomical observations, this eyepiece features 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 high-performance eyepiece provides 20mm eye relief.

Improved 70 degree field of view for easier viewing XW 20 will give a wider field of view than our previous eyepieces when used on Pentax Spotting Scopes or with telescopes Designed specifically provide ideal viewing conditions when used with a telescope Fully multi-coated lenses increase light transmission and color quality High-refraction, low-dispersion lanthanum glass elements deliver bright, high-resolution images with minimal aberrations and distortions