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Explore Scientific 4-element 2X 1.25" focal extender

Explore Scientific 4-element 2X 1.25" focal extender
See Extended Information for Full Description
 
Alternative Views:
4-element Focal Extender
List Price: $189.99
Our Price: $159.99
Savings: $30.00
Focal Length n/a
Eye Relief: n/a
Diameter: 1.25"
Apparent Field n/a
Product Weight: 258g

Quantity in Stock:(Product not currently in stock. Pre- or Back-orders accepted.)
Availability:: Back Order
Product Code: 2201000
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Description Technical Specs Extended Information
 
Explore Scientific 4-element 2X 1.25" focal extender, compression ring binding
Features
  • 1.25"
  • 2X
  • 4-element design to control spherical and chromatic aberration
  • Superior image quality to standard barlows
  • Conical barrel undercutting for safety
  • Robust construction for use with heavy eyepieces

Average Rating: Average Rating: 4 of 5 4 of 5 Total Reviews: 1 Write a review »

  0 of 0 people found the following review helpful:
 
4 of 5 Does the job June 9, 2020
Reviewer: Rodney Post from Concord, CA United States  
I don’t generally use barlows but my 30 year old TeleVue 2x has worked well enough EXCEPT on my longer eyepieces like the 16 Nag or the 24 Pan. I would get the predictable vignette of the outer field. I like a 2x power so I went for the E.S. 2x Extender and am happy with it. No more dimmed and fuzzy field stop and optically detect no degradation of the image. The two thumbscrews are redundant so I removed one and shortened the other making it more user friendly. All in a nice replacement for my old TeleVue.

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