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Explore Scientific Focal Extenders

Explore Scientific Focal Extenders multiply the focal length of your telescope to raise magnification, using a telecentric design rather than a simple Barlow layout. They come in 2x and 3x for both 1.25" and 2" eyepieces, plus a 5x in 1.25".

A telecentric extender keeps eye relief and field illumination close to the eyepiece's native behavior, which helps with wide-field eyepieces. The 3x and 5x models suit planetary imaging and high-power views of the Moon, planets and double stars.

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CA$167.99 - CA$167.99
CA$167.99
CA$167.99 - CA$167.99
CA$167.99

Explore Scientific 2x Focal Extender - 1.25"

ES-FE02-125

Doubles the magnification of any 1.25" eyepiece Telecentric optical design ensures a true 2x power factor Maintains the original eye relief of the...

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CA$167.99
CA$167.99 - CA$167.99
CA$167.99
CA$251.99 - CA$251.99
CA$251.99
CA$251.99 - CA$251.99
CA$251.99

Explore Scientific 3X Focal Extender - 2"

ES-FE03-020

Provides 3X magnification for any 2" or 1.25" eyepiece Telecentric optical design ensures consistent magnification Fully EMD-coated optics for max...

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CA$251.99 - CA$251.99
CA$251.99
CA$251.99 - CA$251.99
CA$251.99
CA$251.99 - CA$251.99
CA$251.99
CA$251.99 - CA$251.99
CA$251.99

Explore Scientific 2X Focal Extender - 2"

ES-FE02-020

2X Focal Extender 2-inch Barrel with 1.25-inch Adapter Telecentric Optical Design Fully EMD-Coated Optics Edge-Blackened Lens Elements Descript...

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CA$251.99 - CA$251.99
CA$251.99
CA$251.99 - CA$251.99
CA$251.99
CA$181.99 - CA$181.99
CA$181.99
CA$181.99 - CA$181.99
CA$181.99

Explore Scientific 5X Focal Extender - 1.25"

ES-FE05-125
2 in stock

Delivers a 5X magnification increase to any 1.25" eyepiece 1.25" barrel diameter fits standard focusers and accessories Telecentric optical design...

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CA$181.99 - CA$181.99
CA$181.99
CA$181.99 - CA$181.99
CA$181.99
CA$195.99 - CA$195.99
CA$195.99
CA$195.99 - CA$195.99
CA$195.99

Explore Scientific 3X Focal Extender - 1.25"

ES-FE03-125
1 in stock

Instantly triples the magnification of any 1.25" eyepiece Telecentric optical design provides consistent magnification Maintains the eye relief of...

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CA$195.99 - CA$195.99
CA$195.99
CA$195.99 - CA$195.99
CA$195.99