Tele Vue 3.5" Extension Tube with Brass Clamp Ring
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Tele Vue 3.5" Extension Tube with Brass Clamp Ring

SKU: TVET3N MFR: X3C-0009
(1)17 questions, 39 answers
$69.00
$90.00
Save: $21 (23%)
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Key Features

  • Achieve precise focus with this Tele Vue extension tube for crisp astrophotography.
  • Maximize your telescope's focal length using this essential Tele Vue accessory.
  • The 3.5" extension tube ensures optimal spacing for superior optical performance.
  • Enhance image quality and clarity with this must-have telescope extension tube.
  • Securely attach your camera with the brass clamp ring for stable astrophotography.
  • Fine-tune your telescope setup for breathtaking views with this Tele Vue tube.
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Special Order?Estimated to Ship: 09/07/2025
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Questions & Answers

Mike B : Does this have a 2" barre; for 2" eyepieces ?STEPHEN P : I can confirm this 3 inch extension tube has a 2 inch barrel, so it is suitable for all 2 inch accessories. I purchased one of these in January 2011 for my 2 inch barrel ccd camera. Hope this helps. SteveLARRY B : yes it is. an its top quality as good or better then any other brand made

Reviews about this item

Review Summary

2011-10-16T21:00:00

Rated 5 out of 5

Allows elimination of the diagonal

I use this 3.5-inch extension tube (it's not 3" as suggested by the Adorama description) for allowing me to eliminate the diagonal mirror between my telescope and an eyepiece, so that the eyepiece is in-line with the telescope (not perpendicular). I have a refractor telescope and as a result a tall tripod, which can make the eyepiece too high when using the diagonal if the scope is pointed near the horizon. Eliminating the diagonal allows for easy viewing of objects near the horizon and also allows me to use the telescope for terrestrial purposes (which is helpful for sighting in the finder scope if my sighting target is land based). The quality of the extension tube is as you would expect from TeleVue (i.e., excellent).

RUSS M.

About Tele Vue 3.5" Extension Tube with Brass Clamp Ring

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Allows elimination of the diagonal

By RUSS M.

I use this 3.5-inch extension tube (it's not 3" as suggested by the Adorama description) for allowing me to eliminate the diagonal mirror between my telescope and an eyepiece, so that the eyepiece is in-line with the telescope (not perpendicular). I have a refractor telescope and as a result a tall tripod, which can make the eyepiece too high when using the diagonal if the scope is pointed near the horizon. Eliminating the diagonal allows for easy viewing of objects near the horizon and als...

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Key Features

  • Achieve precise focus with this Tele Vue extension tube for crisp astrophotography.
  • Maximize your telescope's focal length using this essential Tele Vue accessory.
  • The 3.5" extension tube ensures optimal spacing for superior optical performance.
  • Enhance image quality and clarity with this must-have telescope extension tube.
  • Securely attach your camera with the brass clamp ring for stable astrophotography.
  • Fine-tune your telescope setup for breathtaking views with this Tele Vue tube.