Explore Scientific 2X Barlow for 2" eyepieces, with 1.25" adapter


Availability: In stock

This new four-element 2" 2x Explore Scientific focal extender (Barlow lens) has a 1.25" eyepiece adapter so you can use both 2" and 1.25" eyepieces in your 2" focuser . . .
Our Product #: ESB2X2
Explore Scientific Product #: FE02-020

Product Description

The 2" 2x Explore Scientific premium Barlow (described by Explore Scientific as a focal extender, rather than a Barlow) uses an advanced four-element optical design that delivers a flatter field-of-view with sharper field edges than even the best three-element apochromatic Barlows. A 1.25" adapter lets you use this Explore Scientific 2" focal extender with your 1.25" eyepieces, as well.

This Explore Scientific focal extender doubles the power of any 2" or 1.25"eyepieces used with it, providing high powers while maintaining thecomfortable eye relief of longer focal length eyepieces. You get all ofthe wide field of view of your 2" eyepieces without degrading thesharpness at the edge of the field as a conventional Barlow can.

All air-to-glass surfaces are fully coated with multiple layers of individually tuned ion-deposited anti-reflection materials for maximum light transmission and contrast. The lens edges and all internal metal surfaces are  blackened to maximize the image contrast. Eyepieces are held in place in both the 2" focal extender and the 1.25" adapter by non-marring clamp rings that won't scratch your eyepieces as a conventional metal thumbscrew can. The 2" barrel is threaded to hold 2" filters.

While it is not specifically claimed to be apochromatic in performance, the color fringing in this 2" Explore Scientific focal extender is essentially eliminated for all practical purposes with all telescope types and focal ratios.

This Explore Scientific focal extender is protected by a one year warranty that can be extended to a transferable limited product lifetime warranty at no cost by simply sending in the warranty card. With the extended product lifetime warranty, this Explore Scientific focal extender is protected for as long as it continues to be manufactured, plus an additional five years.

Tech Details

Barrel Size 2"
Length 4.5"
Number of optical elements 4
Power 2x
Weight 23 oz.; 1.25" adapter adds 4 oz.
Warranty 1 year, extendable to lifetime


Review by:
I get a lot of use from this extender on both my C14 and 127mm apo, both for planetary astrophotography and paired with ES eyepieces. (Posted on 9/10/2019)
Review by:
Very well built.Solid! (Posted on 1/12/2019)
Review by:
Works well with the ES 100deg eyepieces. Compares well to the TV barlows and much better than the cheaper options out there. (Posted on 12/31/2018)
Review by:
Compares well with the TV barlows I have. (Posted on 12/31/2018)
Review by:
Excellent piece of glass! I am using it with 8" Celestron SCT and ASI 290MC camera for planetary imaging. Very good investment! (Posted on 10/6/2018)
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Supplied Accessories

1.25" compression ring eyepiece adapter
Dust covers