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Pentax XW30-R 30mm Wide-Angle Eyepiece (2-inch)

  • mfr: 70537
  • SKU: 70537
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Product highlights

  • Focal length: 30mm
  • Provides a 50.8mm (2-inch) installment diameter
  • 70-degree field of view for comfortable viewing
  • Extra-long 20mm eye relief for wide-perspective image
  • Extra-low-dispersion Lanthanum glass
  • Pentax multi-layer coating on all surfaces
  • Light-shielding diaphragm for improved image contrast
  • Adjustable twist-up eye cup
  • JIS Class 4 weatherproof construction

Pentax XW30-R 30mm Wide-Angle Eyepiece (2-inch)

Ricoh Imaging is pleased to announce the release of the smc Pentax XW30-R Eyepiece as part of the Sports Optics Line. This eyepiece offers a 70-degree field of view for comfortable viewing. It is specially designed to offer an excellent field of view while the fully multi-coated lenses increase light transmission and color quality. It provides ideal viewing when used with a telescope for viewing the nebula, planets and exploring the night sky.

Long-Focal-Length Eyepiece

Thanks to its long-focal-length design, this eyepiece will let you observe large celestial bodies spreading across the night sky, such as the Pleiades star cluster and the Andromeda Galaxy, in their entirety when mounted on an astronomical telescope with a focal length of 1000mm.

70-Degree Apparent Angle of View and 20mm Eye Relief

All smc Pentax XW-series eyepieces feature an extra-wide 70-degree apparent angle of view and an extra-long 20mm eye relief to deliver an exciting, wide-perspective image.

High-Grade Optics for Exceptional Image Quality

The high-performance XW-series optics incorporates high-refraction, extra-low-dispersion lanthanum glass elements to produce a well-balanced image with minimal aberrations. It is particularly designed to reduce the disturbing blackout effect by effectively compensating the spherical aberration of the pupil.

Pentax Multi-Layer Coating

All lens surfaces that come in contact with air are treated with the original multi-layer coating, while all laminated surfaces are treated with the innovative partial coating, to offer the light transmission efficiency of more than 90-percent (an astonishing 96-percent at 550nm) over the visible light spectrum.

Advanced Light-Shielding Technology for Improved Image Contrast

Thanks to Pentax’s advanced computer simulation technology, the XW series features a light-shielding diaphragm at the most effective position to drastically reduce internal reflections for a brighter, higher-contrast image.

Comprehensive Lineup to Accommodate All Applications

Featuring functional, practical focal lengths, the XW eyepiece series provides a comprehensive lineup that accommodates all types of applications, from low-magnification viewing of stars to high-magnification observation of planets.

Weatherproof Construction for All-Weather Viewing

The XW series features JIS Class 4 weatherproof construction, making it possible to use it in drizzle or under night dew. Please note that this series is not designed for underwater use and should not be submerged.

Sleeve Size and Eyecup Design

This eyepiece provides a 50.8mm (2-inch) installment diameter. When you remove the screw-on eyecup, the XW30-R model provides a screw thread with a 48mm diameter and a 0.75 pitch.


Configuration Core
Eyepiece Type Fixed Eyepieces
Barrel Diameter 2"
Focal Length 30mm
Color Black


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You have 30 days to make a return. During the holiday season, from November 1 to December 31, we extend the return window to 60 days. 
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We do not currently offer exchanges. Please return the item you purchased within 30 days and order what you’d like instead. 
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Most items can be returned within 30 days for a full refund. Click here to read our full return policy. 

Shipping and Returns

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All orders placed by 4PM( EST), Monday through Thursday, and by 11AM (EST) on Friday, are shipped same day. Orders placed outside these times will ship the next business day. We do not ship internationally or to Puerto Rico, Guam and other US territories at this time. For more details click here.

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Flexible, Easy Returns

If you're not happy with your purchase for any reason, our flexible 30-day free return policy makes it easy to get a full refund. Click here to view our return policy.

Ratings and reviews

Pentax XW30-R 30mm Wide-Angle Eyepiece (2 inches)

Pentax XW30-R 30mm Wide-Angle Eyepiece (2-inch) SKU: 70537

Rated 5 out of 5 by from You get what you pay for Proven Japanese build quality as expected from Hoya - Pentax. I bought three of these over time and surpassed the cost of my telescope! I am a newbie so I didn't spend a lot on my first telescope. At least I know I can use these eyepieces towards my future telescopes. Focus Camera had the best price and was available for immediate shipping.
Date published: 2023-11-07
Rated 5 out of 5 by from Great eyepiece for my AT72EDll I bought my AT72EDll to use for surfing the sky and wanted a nice wide angle eyepiece. The Pentax 30mm XW does a great job of providing beautiful sharp wide angle views of the cosmos.
Date published: 2023-01-30
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Free standard shipping included


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Free standard shipping included