Pentax XW 20mm Eyepiece

Eyepieces > Spotting Scopes

  • Lens Structure: 6 elements, 4 groups
  • Focal Length (mm): 20
  • Apparent Field of View: 70 degrees
  • Eye Relief: 20mm
  • Attachment Diameter: 1.25" (25.4mm)
  • Filter Diameter(mm): 28.6
  • Field Stop Diameter(mm): 24
  • Eyepiece Ring: Helicoid type
  • Height (mm): 96
  • Width (mm): 61
  • Weight (gms): 355
XW Widefield eyepieces from Pentax have replaced the much respected XL series. 40mm and 30mm are 2" barrel size, all others are 1.25". All now have 70 degree apparent fields, excellent edge of field performance, parfocal, adjustable eyecup positioning and fully multi-coated. Many astronomers prefer the performance of these eyepieces over other widefield designs.
The XW 20 eyepiece is designed for use with a wide range of PENTAX spotting scopes and telescopes. 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 a 70 degree field of view and 20mm eye relief.
View the whole Pentax Binoculars, Spotting Scopes & Telescopes product range.
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