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Pentax - XW-5 Eyepiece


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Availability: Available - Ships in 2-4 Days


Available - Ships in 2-4 Days

Manufactured by: Pentax


The PENTAX XW 5 boasts a 70 degree field of view for easier viewing, optical clarity second to none in its class and the shortest focal length in the XW series.

All Pentax XW eyepieces are manufactured with high-refraction, low-dispersion lanthanum glass which delivers high-resolution, bright images with maximum clarity and minimum distortion. Additionally, the XW-series eyepieces meet JIS Class 4 weather standards, thus increasing their durability regardless of atmospheric conditions. 

XW-eyepieces are designed to be used with a broad range of of Pentax spotting scopes and telescopes. Expect Pentax quality and clarity whether your application is astronomical or Earth-bound. 

Product Series

PENTAX Corporation is pleased to announce the introduction of the smc PENTAX XW series of eyepieces designed for use with PENTAX-brand spotting scopes and telescopes in ground and astronomical observations. Consisting of eight models with a focal length ranging from 3.5mm to 40mm, the new XW series features a wide apparent angle of view (70 degrees), JIS Class 4 weather-proof construction and a long eye relief (20mm). The new optics, incorporating high-refraction, low-dispersion lanthanum glass elements and PENTAX-original multi-layer coating, delivers bright, high-resolution images with minimal aberrations and distortions.

The new XW series retains all the popular features of the current XL series, including eyepiece shape, while upgrading many vital specifications. All XW models feature a 70-degree apparent angle of view, delivering a more dramatic, wide-perspective image than the 65 degrees of the XL series. Laminated optical elements are treated with the innovative partial coating, which offers much higher light transmission capability than conventional full-surface coating. Thanks to advanced computer simulation technology, internal reflections are drastically reduced to produce brighter, clearer images. Replacing the existing XL series, the new XW series can be used with the PENTAX PF-80ED, PF-80EDA and PF-100ED spotting scopes and a range of PENTAX telescopes to optimize their performance and capability. The XW7, XW10, XW14 and XW20 models are suited for both ground and astronomical applications, while the XW3.5, XW5, XW30 and XW40 models are exclusively designed for astronomical observations. # Improved 70 degree field of view for easier viewing # XW 7,10, 14, 20 will give a wider field of view than our previous eyepieces when used on Pentax Spotting Scopes or with telescopes. # WX 14, 20, 30, and 40 are 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 # Advanced computer simulation design technology was used to drastically reduce internal reflections producing brighter, clearer images # JIS Class 4 weather proof construction makes these eyepieces more durable # Long eye-relief for viewing with or without glasses # Limited Lifetime Warranty

Additional Information

Name Pentax - XW-5 Eyepiece
Manufacturer Pentax
Model 70512
Manufacturer Part No 70512
Apparent Field of View 70°
Eye Relief 20mm
Eyepiece Barrel Size 1.25"
Field Stop Diameter 623mm