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Explore Scientific 1.25-inch 3x Focal Extender

SKU FE03-125
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Original price $0.00 - Original price $0.00
Original price $0.00
$284.00 - $284.00
Current price $284.00
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Explore Scientific 1.25" 3x Focal Extender - FE03-125

Introducing the Explore Scientific 1.25-Inch 3x Focal Extender—a versatile addition to your telescope accessories.

This extender increases the magnification of eyepieces with the same barrel size, offering six magnification choices with three eyepieces.

Lower magnification eyepieces generally provide better eye relief, and by using this focal extender, users can enjoy the generous eye relief of lower power eyepieces even at higher magnifications.

This feature is particularly advantageous for eyeglass wearers or those with fast telescopes who often use high magnification eyepieces.

Explore Scientific also offers focal extenders in 2x, 3x, and 5x models, ensuring there is an option for every style of telescope.

Elevate your astronomical observations with this high-quality focal extender.



  • Versatile Magnification Boost: The Explore Scientific 1.25-Inch 3x Focal Extender enhances your telescope accessory lineup by allowing an increase in the magnification of any eyepiece with the same 1.25-inch O.D. barrel size.
  • Dual Compatibility: Designed with a 1.25-inch O.D., this extender is compatible with eyepieces featuring this standard barrel size, offering flexibility in your observational experiences.
  • Increased Magnification Choices: With this focal extender, three eyepieces can provide six magnification choices, allowing users to adapt their telescope setup to various celestial objects and observation styles.
  • Enhanced Eye Relief: Lower magnification eyepieces typically offer better eye relief. By using the focal extender to increase magnification, users can enjoy the generous eye relief of lower power eyepieces even when observing at higher magnifications. This is especially beneficial for eyeglass wearers or those with fast telescopes using high magnification eyepieces.
  • Comprehensive Series: Explore Scientific offers focal extenders in 1.25-inch O.D. with 2x, 3x, and 5x models, catering to a wide range of telescope styles and user preferences.
  • Quality Construction: Crafted with precision and quality materials, the focal extender ensures reliable and durable performance, contributing to its longevity as an essential telescope accessory.
  • Adaptable for Various Telescopes: Whether you have a refractor, reflector, or compound telescope, the 1.25-inch 3x Focal Extender provides a versatile solution for magnification adjustments, making it suitable for different telescope styles.
  • Optical Coating for Superior Contrast: Fully EMD-coated on all air-to-air lens surfaces, the extender ensures optimal light transmission, resulting in superior contrast and clear, crisp views during observations.



Item Number FE03–125
Barrel Size 1.25-inch
Length 93mm
Width 45mm
Weight 249 grams; 8.7 Oz
Warranty Limited 1 Year

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