# Barlow Lens DO-GSO 2.5x 1.25-inch

**URL:** https://aio.lv/en/product--oem-bl251--11391551
**Data updated:** 2026-09-07 04:12 (EEST)
**Category:** Telescopes
**Manufacturer:** OEM
**Manufacturer code:** BL251
**EAN:** 5901691606920
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

Barlow lens DO-GSO 2.5x 1.25" optical accessory for telescopes. Increases the focal length and magnification of 1.25-inch eyepieces by 2.5 times, enhancing detail during lunar, planetary, and deep-sky astronomical observations. Essential tool for amateur astronomers seeking higher magnification options.

## Long description

The Barlow Lens DO-GSO 2.5x 1.25-inch is an essential optical accessory designed to enhance your telescope's performance. By increasing the focal length and magnification of standard 1.25-inch eyepieces by 2.5 times, this accessory allows amateur astronomers to achieve closer views of celestial objects without needing a large set of additional eyepieces. It provides a reliable way to boost optical power while maintaining clarity during observation sessions.
Advantages
This Barlow lens effectively multiplies the magnification of any compatible 1.25-inch eyepiece, expanding your existing collection's capabilities with a single addition. It helps reveal finer details on planetary surfaces, lunar craters, and deep-sky targets. The optical design is optimized to integrate seamlessly into standard telescope setups, offering a practical solution for observers looking to increase their focal length easily.
Suitable for
Lunar observation to study craters and surface features in greater detail
Planetary viewing of Jupiter, Saturn, and Mars at higher magnifications
Deep-sky observations of distant nebulae and star clusters
Amateur astronomers seeking to expand their eyepiece magnification range
When it may not be suitable
This lens may not be ideal for observing very faint deep-sky objects, as the 2.5x magnification factor reduces the amount of light entering the eye, potentially making dim targets harder to see. It is also incompatible with eyepieces that do not use a standard 1.25-inch barrel size.
Key specifications
Magnification factor of 2.5x
Standard 1.25-inch barrel size compatibility
Optical accessory designed for telescopes
How to use
Insert the Barlow lens directly into the telescope's focuser or diagonal, and then place your 1.25-inch eyepiece into the open end of the Barlow lens. Secure both components firmly using the thumbscrews on your equipment. Focus your telescope as usual, making small adjustments since the increased magnification will alter the focal point.
What to consider before purchase
Verify that your telescope and eyepieces use the standard 1.25-inch size format
Assess whether your telescope's mount and tracking stability can support higher magnifications
Consider the local atmospheric seeing conditions, which can impact the clarity of high-magnification views
Regularly clean the optical surfaces with specialized lens cleaning materials and store the Barlow lens in a dry, protective case when not in use to preserve its optical quality.

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### 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 OEM 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 OEM 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

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