Why Purchase from All-Star Telescope?
Free Expert Support
Whether you are a first timer needing help with setting up or an enthusiast that can't quite make that one thing work, our expert staff are ready to support your needs. With decades of knowledge and first hand experience we've been there and we can help you through it!
Stress Free, Secure Transactions
You can trust purchasing and delivery with All-Star Telescope. All of our transactions are 100% secure and Level 1 PCI DSS compliant thanks to Shopify's ShopPay platform. For additional protection, we insure 100% of the value of every shipment we make. If it get's lost during shipment, we replace it. If it gets damaged during shipment, we replace it. We make sure your product arrives exactly as you would expect it to; we promise.
We also ensure privacy protection. We never keep any of your credit card information on file and any of your personal data is stored according to our policies.
30 Day Return Policy
Buy with confidence knowing that we accept returns up to 30 days after purchase. We want you to have something you will actually use and we are confident that we keep good quality products in our store with No Junk.
Price Match Promise
Shipping around for the best price is tough, we make it easier by offering the best pricing in the market. But if you find a better price on an in-store item somewhere else we will match it!
Product Description
Clear, Comfortable Viewing Assured by 85° Apparent Angle of View and 20mm Eye Relief.
All SMC PENTAX XW-series eyepieces feature an extra-wide 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-Original Multi-Layer Coating for Outstanding Light Transmission Efficiency.
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.
A Choice of Six Magnifications to Meet Specific Applications.
With many different magnifications to choose from, the XW series accommodates a wide range of both casual and specialized applications.
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.
* The XW-series eyepieces are not designed for underwater use and should not be submerged under water.
Standard Eyepiece Sleeve and Built-In Adapter-Mounting Screw
The XW series provides a choice of two installment diameters: American-standard 1.25″(31.7mm) version, and 2″ (50.8mm) version. When you remove the screw-on eyecup, the XW30-R and XW40-R models provide a screw thread with a 48mm diameter and a 0.75 pitch, while other models provide a screw thread with a 43mm diameter and a 0.75 pitch.
Specifications
|
Model: |
XW16.5 | XW23 | XW30-R | XW40-R |
| Eyepiece Lens: |
7 elements | 7 elements | 7 elements | 6 element |
| Lens Structure: |
5 groups | 5 groups | 6 groups | 5 groups |
| Focal Length: | 16.5mm | 23mm | 30mm | 40mm |
| Apparent Field of View: | 85˚ | 85˚ | 70˚ | 70˚ |
| Eye Relief: | 20mm | 20mm | 20mm | 20mm |
| Attachment Diameter: | 2” (50.8mm) | 2” (50.8mm) | 2” (50.8mm) | 2” (50.8mm) |
| Filter Diameter: | -- | -- | 48mm | 48mm |
| Field Stop Diameter: | -- | -- | 36.2mm | 46.5mm |
| Eyepiece Ring: | Helicoid type | Helicoid type | Helicoid type | Helicoid type |
| Height & Width: | 3”x5.6" | 3”x4.9" | 4.8”x3.0” | 4.6”x3.0” |
| Weight: | 26.3 oz. (745g) | 27.2 oz. (770g) | 26.1 oz. (740g) | 24.7 oz. (700g) |
