# Eyepiece Pentax XW 40mm (MPN 70538) 70° apparent field of view

**URL:** https://aio.lv/en/product--pentax-70538--11255319
**Data updated:** 2026-03-20 09:48 (EET)
**Category:** Glasses
**Manufacturer:** PENTAX
**Manufacturer code:** 70538
**EAN:** 0027075301696
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 549.49 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 454.12 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--pentax-70538--11255319

## 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 40mm eyepiece (MPN 70538) offers a 40 mm focal length and a 70° apparent field of view for wide, comfortable viewing. Designed for visual observation, it fits telescopes compatible with Pentax XW-series eyepieces and provides a broad field suitable for deep-sky and planetary observation. Useful for amateur astronomers seeking a low-power, wide-field eyepiece.

## Long description

The Pentax XW 40mm eyepiece provides a 40 mm focal length combined with a 70° apparent field of view to deliver wide, comfortable views for visual astronomy. Designed for relaxed low-power observing, this eyepiece is part of the XW series and is intended for use with telescopes that accept Pentax XW-style eyepieces. Its optical design emphasizes an expansive field of view with well-corrected edge performance suitable for observing large star fields, star clusters, nebulae and overall sky surveys.
Advantages
This eyepiece offers a very wide 70° apparent field that increases situational awareness and reduces the need for frequent re-centering. The 40 mm focal length produces a low magnification which is beneficial for wide-field deep-sky observing and locating objects. The XW-series optical formula aims to minimize aberrations and provide comfortable eye relief for extended observing sessions. The mechanical design is compatible with standard focuser diameters used by many telescopes that accept Pentax XW eyepieces.
Suitable for
 Wide-field visual observation of star fields and open clusters
 Deep-sky sweeping and scanning for nebulae and galaxies
 Low-power planetary overview and lunar observing
 Use as a finder eyepiece or for initial target acquisition
Key specifications
 Focal length: 40 mm
 Apparent field of view: 70°
 Eyepiece type: XW-series wide-field eyepiece
 Designed for visual observation
 Low magnification / wide-field use
How to use
Install the eyepiece into the telescope focuser or diagonal designed to accept Pentax XW-style eyepieces. Begin with a low magnification configuration to take full advantage of the 70° apparent field; adjust the telescope focus until the image is sharp across the field. Use slow, deliberate movements to center objects, then fine-focus for best detail. For best performance, ensure the telescope optics are collimated and the eyepiece is clean and free of dust or fingerprints.
Usage recommendations
For wide-field observing nights, pair the eyepiece with a telescope that provides a modest focal ratio to maximize edge-to-edge performance. When switching between eyepieces, allow the eye to adapt to the wider apparent field and reposition slowly to maintain target alignment. Store the eyepiece in a dry, padded case when not in use to preserve optical surfaces.

## FAQ

### How much does the Eyepiece Pentax XW 40mm cost, and is it available for purchase?

The price is 549.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 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 40mm 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/11255319/66727556_large.webp