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Explore Scientific

Explore Scientific Rack & Pinion Focuser Extension Tube 1″ (ESRPEXT1)

Explore Scientific Rack & Pinion Focuser Extension Tube 1″ (ESRPEXT1)

$29.99
$29.99
Sale Sold out
Shipping calculated at checkout.

The Explore Scientific 1″ Extension Tube (ESRPEXT1) adds extra draw‑tube travel to compatible rack‑and‑pinion focusers — giving you greater flexibility for eyepieces, diagonals, cameras, or imaging gear. This extension tube is particularly useful when your setup requires more back‑focus, or when using thick eyepieces or astrophotography rigs that need extra spacing to achieve focus. It’s a simple, lightweight accessory that enhances your telescope’s adaptability without complicated modifications.

Features

  • Adds 1 inch (≈ 25.4 mm) of extra draw‑tube travel — useful for thick eyepieces, diagonals, cameras, or heavy accessories.

  • Designed to attach to compatible rack‑and‑pinion focusers for a seamless fit.

  • Lightweight and compact — adds minimal bulk while extending focusing range.

  • Machined, anodized finish for durability and smooth focusing performance.

Specifications

Specification Detail
Model Number ESRPEXT1
Extension Length 1 inch (≈ 25.4 mm)
Compatible With Rack & Pinion focusers for appropriate telescopes
Purpose Adds back‑focus/flexibility for eyepieces, cameras, diagonals, imaging trains
Construction Machined metal, anodized finish

What’s Included

  • 1 × 1″ Extension Tube (ESRPEXT1) for Rack & Pinion Focusers

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Frequently Asked Questions

With a beginner telescope you can see a surprising amount — the craters and mountains on the Moon, the rings of Saturn, the moons of Jupiter, and star clusters like the Pleiades. As you get more comfortable, you can also spot nebulae and distant galaxies. Not sure which beginner telescope is right for you? Check out our Telescope Buying Guide.
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