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Explore Scientific 2x Barlow Focal Extender, 1.25" Barrel, 4 Elements

SKU: ESFE02125 MFR: FE02-125
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Key Features

  • Double your telescope's magnification with this Explore Scientific 2x Barlow lens!
  • Enjoy sharper, clearer images with the 4-element optical design of this Barlow extender.
  • The 1.25" barrel size makes this Barlow lens compatible with many standard telescopes.
  • Perfect for planetary viewing, this Barlow lens enhances detail at high magnification.
  • Achieve finer focusing adjustments with this 2x Barlow, improving your image quality.
  • Durable construction ensures this telescope eyepiece accessory will last for years to come.
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Special Order?Estimated to Ship: 09/07/2025
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Shopper : Why Did You Choose This?JEFFREY G : High quality, good company with reputation for good optics

Reviews about this item

Review Summary

2021-07-06T13:18:28

Rated 5 out of 5

Well worth the investment

The focal extender is well made, providing a clear bright image. I like the extra sleeve inside the barrel so that the retaining screws don't bear on the lens sleeve.

TOM H.

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Explore Scientific FE02-125 Specifications

  • Barrel Size

    1.25" / 3.17cm

  • Magnification

    2x

  • No of elements

    4

  • Clear lens aperture

    0.67" / 17.01mm

  • Dimensions (L x W)

    96 x 45mm / 3.77 x 1.77"

  • Weight

    260g / 9.17oz

  • UPC Code

    812257010417

About Explore Scientific FE02-125

FEATURED REVIEWS

Well worth the investment

By TOM H.

The focal extender is well made, providing a clear bright image. I like the extra sleeve inside the barrel so that the retaining screws don't bear on the lens sleeve.

With the Explore Scientific 2x Barlow Focal Extender, you can effortlessly double the magnifying power of your telescope or microscope's lens system. This high-quality accessory, featuring a 1.25" barrel and a sophisticated 4-element optical design, ensures a clear and bright image that enhances your astronomical or microscopic observations.

Crafted for both visual and imaging applications, this durable focal extender is a versatile and reliable addition to your equipment. Unlike traditional Barlow or tele-negative lenses, the Explore Scientific Focal Extender offers a consistent 2x magnification regardless of its position in the optical chain. This innovative design means that whether you place it before or after other accessories, such as a diagonal, flip mirror, or filter wheel, the magnification remains unchanged, ensuring precise and predictable results every time.

Astrophotographers, in particular, will appreciate the reliable performance of this focal extender. Its ability to maintain a steady magnification is crucial when introducing additional imaging accessories into the setup. This feature allows for greater flexibility and ease of use, making it an ideal choice for those looking to capture stunning celestial images without the worry of varying magnification levels.

The Explore Scientific 2x Barlow Focal Extender is not only a testament to the brand's commitment to producing high-quality optical equipment but also to its dedication to innovation. The added sleeve inside the barrel protects your lenses from the retaining screws, showcasing the thoughtful engineering that goes into every aspect of this product.

Choose the Explore Scientific 2x Barlow Focal Extender for its exceptional clarity, robust construction, and unwavering performance. Whether you're gazing at the stars or delving into the microscopic world, this focal extender is designed to elevate your viewing experience to new heights.

Explore Scientific FE02-125 Features

  • More Magnification Choices without Sacrificing Eye Relief: A good Focal Extender adds some real versatility to your telescope accessory line-up. First of all, it allows you to increase the magnification of any eyepiece with the same barrel size that you already own
  • Optimized Optical Design: Explore Focal Extenders are optimized through each design, fabrication and testing process to produce high contrast, high resolution images
  • Durable Coatings & Finishing Touches: Each of the four elements in your Explore Scientific Focal Extender is fully multi-coated with EMD enhanced coatings, resulting in bright, sharp images; and every element has blackened edges to reduce internal reflections and increase contrast
  • The insert barrel of each extender is double-tapered to allow smooth insertion to and removal from a telescope's eyepiece holder, focuser or diagonal, however dimension of the taper helps prevent the focal extender from falling out of telescope should the set-screw holding it in place become loose

Key Features

  • Double your telescope's magnification with this Explore Scientific 2x Barlow lens!
  • Enjoy sharper, clearer images with the 4-element optical design of this Barlow extender.
  • The 1.25" barrel size makes this Barlow lens compatible with many standard telescopes.
  • Perfect for planetary viewing, this Barlow lens enhances detail at high magnification.
  • Achieve finer focusing adjustments with this 2x Barlow, improving your image quality.
  • Durable construction ensures this telescope eyepiece accessory will last for years to come.

What's in the box:

  • Explore Scientific 2x Barlow Focal Extender
  • Dust Plug
  • End Cap
  • Explore Scientific 5 Years Warranty