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SMC Eyepiece XW 20
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.
Compatible with the following: PF-65 and PF-65 ED II series spotting scopes, PF-80 series spotting scopes, PF-100 series spotting scopes
* Improved 70 degree field of view for wider views
* XW 3.5mm, 5mm, 7mm, 10mm, 14mm, 20mm, 30mm, and 40mm provide a wider field of view than previous PENTAX eyepieces
* All Pentax XW series eyepieces may be used with astronomical telescopes with appropriate 1 ï¿½" or 2" focusers.
* XW 3.5mm, 5mm, 7mm, 10mm, 14mm, 20mm eyepieces may be used with our PF series Spotting Scopes (except PF 63 Zoom)
* Full multi-coated lenses increase light transmission and contrast
* High refraction, extra-low dispersion lanthanum glass elements deliver bright, high resolution images with minimal distortions and aberrations
* Advanced computer simulation design technology implemented to drastically reduce internal reflections, producing brighter, clearer images
* Weatherproof construction for greater durability
* Long eye relief for comfortable viewing with or without glasses
Lens Structure: 6 elements, 4 groups
Focal Length: 20mm
Apparent Field of View: 70 degrees
Eye Relief: 20mm
Attachment Diameter: 1.25" (31.7mm)
Filter Diameter: 28.6mm
Field Stop Diameter: 24.0mm
Eyepiece Ring: Helicoid type
Height & Width: 3.4" x 2.4"
Weight: 12.6 oz. (355g)