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Pentax 70514 SMC-XW 10 1.25-Inch Telescope Eyepiece — main product image
Pentax 70514 SMC-XW 10 1.25-Inch Telescope Eyepiece
Pentax 70514 SMC-XW 10 1.25-Inch Telescope Eyepiece
Pentax 70514 SMC-XW 10 1.25-Inch Telescope Eyepiece
Pentax 70514 SMC-XW 10 1.25-Inch Telescope Eyepiece
Pentax 70514 SMC-XW 10 1.25-Inch Telescope Eyepiece
Pentax 70514 SMC-XW 10 1.25-Inch Telescope Eyepiece
Pentax

Pentax 70514 SMC-XW 10 1.25-Inch Telescope Eyepiece

★★★★★4.7 (107 reviews)

A premium 10mm telescope eyepiece with 70° apparent field of view, lanthanum glass optics, and 20mm eye relief.

$246.00*$349.00Save 29%
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*Price sourced from Amazon.com. Last updated:Jun 27, 2026.Price and availability are subject to change.

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Overview

The Pentax SMC-XW 10 is a high-performance 1.25-inch eyepiece built around extra-low-dispersion lanthanum glass elements and Pentax's proprietary multi-layer coatings. This optical combination delivers images that are bright, sharply resolved, and remarkably free of chromatic aberration and field distortion across the full 70° apparent field of view. Whether you are observing planetary detail, splitting tight double stars, or scanning deep-sky objects at moderate-to-high magnification, the XW 10 provides a view that rewards careful looking.

Beyond optics, the XW 10 addresses practical observing needs that matter during long sessions at the eyepiece. The 20mm eye relief is generous enough for comfortable use with eyeglasses, eliminating the need to squint or press your eye uncomfortably close. The JIS Class 4 weatherproof rating means dew, light rain, or humidity during evening observing will not compromise the eyepiece's internals. The rubber eyecup and solid build quality inspire confidence that this is a piece of equipment designed for years of regular use in real field conditions, not just ideal ones.

Key Features

70° Field of view for easier viewing

Xw 3. 5mm, 5mm, 7mm, 10mm, 14mm, 20mm will give a wider field of view than typical eyepieces when used on Pentax spotting scopes or with most any 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 distortion

Specifications

Brand
Pentax
Model
70514
Focal Length
10mm
Apparent Field of View
70°
Eye Relief
20mm
Barrel Size
1.25-Inch (31.7mm)
Optical Elements
High-refraction, extra-low-dispersion lanthanum glass
Coatings
Pentax-Original Multi-Layer Coating (Fully Multi-Coated)
Weather Resistance
JIS Class 4 Weatherproof

Pros & Cons

👍 Pros

  • Wide 70° apparent field of view makes locating and following objects noticeably easier than narrower eyepieces
  • Generous 20mm eye relief provides comfortable viewing for eyeglass wearers
  • Lanthanum glass elements produce sharp, high-contrast images with minimal color fringing
  • JIS Class 4 weatherproof construction stands up to outdoor observing conditions
  • Pentax multi-layer coatings maximize light transmission for brighter views

👎 Cons

  • Premium pricing places it well above budget eyepiece alternatives
  • At 10mm focal length, it produces high magnification that amplifies any telescope tracking instability
  • Only available in a 1.25-inch barrel, so it cannot take advantage of 2-inch focuser capacity for wider true fields

Frequently Asked Questions

The eyepiece provides a 70° apparent field of view, which is wider than most standard eyepieces and makes it easier to locate and track celestial objects.
Yes, it uses a standard 1.25-inch (31.7mm) barrel size, making it compatible with most telescopes and spotting scopes that accept that format.
Yes, the generous 20mm eye relief allows comfortable viewing with or without eyeglasses, so you can see the full field of view without removing them.
Yes, it carries a JIS Class 4 weatherproof rating, meaning it can withstand splashing water from any direction — useful during outdoor observing sessions.
It uses high-refraction, extra-low-dispersion lanthanum glass elements, which deliver bright, high-resolution images with minimal chromatic aberration and distortion.

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