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Explore Scientific 2X Focal Extender - 2"

Explore Scientific 2X Focal Extender - 2"

by Explore Scientific
SKU ES-FE02-020
CA$251.99 - CA$251.99
CA$251.99
CA$251.99 - CA$251.99
CA$251.99
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  • 2X Focal Extender
  • 2-inch Barrel with 1.25-inch Adapter
  • Telecentric Optical Design
  • Fully EMD-Coated Optics
  • Edge-Blackened Lens Elements
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • Explore Scientific 2X Focal Extender - 2"

    The Explore Scientific 2X Focal Extender doubles the power of your entire eyepiece collection, accepting both 1.25-inch and 2-inch formats for maximum compatibility. Its telecentric optical design delivers a consistent 2X magnification factor, unlike a traditional Barlow lens, ensuring predictable, high-contrast views for both visual astronomy and astrophotography.

    2X Power for All Your Eyepieces: 1.25" and 2" Compatibility

    This 2-inch focal extender instantly doubles the utility of your eyepiece case. By providing 2X magnification, it allows a set of three eyepieces to deliver six different powers, filling gaps in your magnification range without the cost of new eyepieces. Its versatile design accepts both 2-inch and 1.25-inch eyepieces, ensuring it works with every eyepiece you own, from wide-field sweepers to high-power planetary models.

    A True 2X Telecentric Design for Superior Contrast

    Unlike a standard Barlow lens whose magnification can change with distance, the Explore Scientific 2X Focal Extender uses a multi-element telecentric design. This advanced optical system ensures light rays remain parallel to the optical axis, delivering a fixed, true-to-spec 2X magnification regardless of eyepiece or camera spacing. To maximize image fidelity, all air-to-air lens surfaces are fully EMD-coated and all lens elements are edge-blackened, which together suppress internal reflections and produce a darker background sky with superior contrast.

    Maintain Comfortable Eye Relief at 2X Magnification

    One of the greatest advantages of a focal extender is its ability to preserve the comfortable eye relief of your low-power eyepieces. When you use this 2X extender with a long eye relief 30mm or 40mm eyepiece, you get the benefit of high magnification without the tight, uncomfortable eye placement typical of short focal length eyepieces. This is a significant advantage for eyeglass wearers and for anyone conducting long, relaxed observing sessions at high power.

  • How is the Explore Scientific 2X Focal Extender different from a standard 2X Barlow lens?

    The key difference is its telecentric optical design. A traditional Barlow's magnification changes depending on its distance from the eyepiece or camera sensor. The Explore Scientific Focal Extender delivers a constant, true 2X magnification factor, providing more consistent and predictable results for both visual use and imaging.

    Can I use my 1.25" eyepieces with this 2-inch Explore Scientific Focal Extender?

    Yes. The Explore Scientific 2X Focal Extender is designed to be versatile and accepts both 2-inch and 1.25-inch eyepieces and accessories. This allows you to double the magnification of your entire eyepiece collection with a single device.

    Will the Explore Scientific 2X Focal Extender help me see more detail on Jupiter with my 8" SCT?

    Absolutely. Using the 2X Focal Extender with a low-to-mid power eyepiece in your 8" Schmidt-Cassegrain will double the magnification, making it easier to resolve fine details like cloud bands on Jupiter, the Cassini Division in Saturn's rings, and small craterlets on the Moon. It allows you to reach the ideal planetary magnification while using an eyepiece with more comfortable eye relief.

    Does this 2X Focal Extender preserve the eye relief of my eyepieces?

    Yes, and this is one of its primary benefits. When you use the Explore Scientific 2X Focal Extender, you retain the generous eye relief of the eyepiece it's paired with. This lets you enjoy high-power views without the eyestrain or "squinting" associated with short focal length eyepieces, a feature especially valuable for observers who wear glasses.

    Is the Explore Scientific 2X Focal Extender suitable for astrophotography?

    Yes. The telecentric design is ideal for imaging because it provides a consistent magnification factor and a flatter field than many standard Barlows. It's an excellent choice for increasing your image scale for planetary, lunar, and solar imaging with the appropriate filters.

    How will this extender perform with a 24mm 82-degree eyepiece in my 10" f/4.7 Dobsonian?

    In this setup, the Explore Scientific 2X Focal Extender will effectively turn your 24mm eyepiece into a 12mm eyepiece, doubling the magnification for high-power views of globular clusters like M13 or planetary nebulae like the Ring Nebula (M57). You get the power of a 12mm eyepiece while enjoying the comfortable eye relief and immersive feel of your 24mm 82-degree eyepiece.

  • GTIN 8122570104000
  • Explore Scientific Warranty