# DO-GSO 2.5x 1.25" Barlow lens

**URL:** https://aio.lv/en/product--no-name-bl251--12669091
**Data updated:** 2026-09-12 04:27 (EEST)
**Category:** Telescopes
**Manufacturer:** No name
**Manufacturer code:** BL251
**EAN:** 5901691606920
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

Enhance your telescope viewing experience with the DO-GSO 2.5x 1.25" Barlow lens. Designed to increase the magnification of 1.25-inch eyepieces by 2.5 times, this optical accessory helps achieve closer views of celestial objects such as the Moon and planets. Ideal for amateur astronomers looking to expand their optical magnification range without compromising image clarity during nighttime stargazing observations.

## Long description

The DO-GSO 2.5x 1.25" Barlow lens is a precision optical accessory designed to enhance your telescope viewing experience by increasing the magnification of 1.25-inch eyepieces by 2.5 times. This reliable tool allows amateur astronomers to achieve closer, more detailed views of celestial objects such as the Moon and planets without the need to purchase multiple additional high-magnification eyepieces. Built for nighttime stargazing, it integrates smoothly into existing optical setups to expand your magnification range while maintaining optical performance and image clarity.
Advantages
By multiplying the effective focal length of your telescope, this Barlow lens instantly doubles the utility of your current eyepiece collection, providing high-power views using your standard eyepieces. It helps astronomers observe fine planetary details and lunar craters with greater ease. The accessory is constructed to preserve the optical quality of your telescope system, ensuring that contrast and resolution remain at a high level during observations. Its standard 1.25-inch barrel size ensures broad compatibility with a wide variety of standard astronomical equipment.
Suitable for
Observing lunar craters, mountain ranges, and surface features in detail
Studying planetary features such as the rings of Saturn and the cloud belts of Jupiter
Expanding the magnification range of existing 1.25-inch telescope eyepieces
Amateur astronomers seeking a cost-effective way to increase magnification
When it may not be suitable
This product may not be suitable if your telescope is already operating beyond its maximum useful magnification limit, as adding a 2.5x Barlow lens will result in dim and blurry images. It is also incompatible with eyepieces that use a 2-inch barrel size unless a dedicated adapter is used.
Key specifications
Accessory type: Barlow lens
Magnification factor: 2.5x
Barrel size: 1.25 inches
Intended application: Nighttime stargazing and astronomical observation
How to use
To use the DO-GSO 2.5x 1.25" Barlow lens, first insert the lens directly into the telescope's focuser or diagonal. Secure it firmly by tightening the thumbscrews. Next, take your 1.25-inch eyepiece and insert it into the upper barrel of the Barlow lens, then tighten the securing mechanism to hold the eyepiece safely in place. Focus your telescope using the focus knobs until the celestial image appears sharp. Always begin your observation session with a lower-power eyepiece before switching to higher magnifications.
What to consider before purchase
Verify that your telescope focuser accepts 1.25-inch accessories
Check your telescope's maximum useful magnification to ensure it supports a 2.5x increase
Confirm that your existing eyepieces have a 1.25-inch barrel diameter
For the best viewing results, ensure all optical surfaces are kept clean using specialized lens cleaning tools and store the Barlow lens in a dry environment with dust caps attached when not in use.

## FAQ

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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 No name 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 No name 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

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