# Eyepiece PENTAX XW 7 — 20 mm focal length, black, premium wide-field optical eyepiece

**URL:** https://aio.lv/en/product--pentax-70513--11423922
**Data updated:** 2026-02-24 11:02 (EET)
**Category:** Glasses
**Manufacturer:** PENTAX
**Manufacturer code:** 70513
**EAN:** 0027075075214
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 366.99 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 303.30 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--pentax-70513--11423922

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 25.06.2026 | free |
| Pickup points | 30.06.2026 | 1.99 EUR |
| Courier delivery to door | 30.06.2026 | 4.99 EUR |

## Summary description

PENTAX XW 7 eyepiece with a 20 mm focal length in black finish. Manufactured in Japan, this wide-field optical eyepiece is designed for visual observation and eyepiece swapping on compatible telescopes and spotting scopes. Compact dimensions (approx. 190 × 83 × 100 mm as packaged) make it suitable for field use, astronomy, birdwatching and terrestrial observing where a comfortable eye relief and broad apparent field are required.

## Long description

PENTAX XW 7 — 20 mm focal length eyepiece is a premium wide-field optical eyepiece optimized for visual observation with telescopes and PENTAX spotting scopes. Manufactured in Japan, it combines a short focal length with a 70° apparent field of view to present a broad, immersive image. The eyepiece uses high-refraction, low-dispersion lanthanum glass to deliver bright, high-resolution views with minimal chromatic aberration and reduced distortion. Compact packaged dimensions make it convenient for field use in astronomy, birdwatching and terrestrial observing, while JIS Class 4 weather-proof construction improves reliability in challenging outdoor conditions.
Advantages
The XW 7 offers a wide apparent field of view (70°) and a short 20 mm focal length that together enable easier framing and a more immersive viewing experience. Lanthanum glass elements provide high contrast and low dispersion for clear, sharp images across the field. The eyepiece’s compact design and weather-proof construction increase portability and durability for outdoor use. Its comfortable eye relief makes extended observation sessions less fatiguing and simplifies eyepiece swapping on compatible instruments.
Suitable for
 Astronomical observations with telescopes requiring a wide-field eyepiece
 Birdwatching and wildlife observation with spotting scopes
 Terrestrial viewing where high resolution and low distortion are important
 Fieldwork that demands compact, weather-resistant optical accessories
Key specifications
 Focal length: 20 mm
 Apparent field of view: 70 degrees
 Optical glass: high-refraction, low-dispersion lanthanum glass
 Finish: black
 Packaged dimensions (approx.): 190 × 83 × 100 mm
 Weather resistance: built to JIS Class 4 standard
How to use
Install the eyepiece in the focuser or eyepiece holder of a compatible telescope or PENTAX spotting scope following the instrument manufacturer’s instructions. Adjust the focus until the image is sharp, then fine-tune the eyepiece position for comfortable eye relief and full field coverage. For best results, use with properly collimated optical systems and appropriate magnification for the observing target. Allow the eyepiece and optical instrument to reach ambient temperature before critical observations to reduce temporary focus shifts.
Usage recommendations
Handle the eyepiece by the barrel and avoid touching optical surfaces. Clean lenses only with a blower, soft brush or lens tissue and appropriate cleaning fluid when necessary. Store the eyepiece in a protective case in a dry environment to preserve coatings and mechanical parts. For observations in cold or humid conditions, allow the eyepiece to acclimate and protect the eyepiece from direct precipitation despite its weather-proof design.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.39 kg |
| Height | 100 mm |
| Focal length range | 7 |
| Filter size | 28.6 mm |
| Width | 190 mm |
| Depth | 83 mm |
| Product colour | Black |
| Lens structure (elements/groups) | 8/6 |
| Compatible products | PF-65, PF-65 ED 2, PF-80, PF-100 |
| Apparent field of view | 70 ° |
| Eye relief | 20 mm |
| Country of origin | Japan |
| Field stop diameter | 8.8 mm |
| Eyepiece ring type | Helicoid |

## FAQ

### How much does the Eyepiece PENTAX XW 7 — 20 mm cost, and is it available for purchase?

The price is 366.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 25.06.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Eyepiece PENTAX XW 7 — 20 mm be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All PENTAX products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized PENTAX service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11423922/66178183_large.webp