• Rack and Pinion Focuser 1.5-inch Extension Tube
  • Rack and Pinion Focuser 1.5-inch Extension Tube
  • Rack and Pinion Focuser 1.5-inch Extension Tube
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Explore Scientific

Explore Scientific 2-Inch Rack & Pinion Focuser Extension Tube — Extend the Back-Focus Reach of Your Telescope

Explore Scientific 2-Inch Rack & Pinion Focuser Extension Tube — Extend the Back-Focus Reach of Your Telescope

$39.99
$39.99
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Shipping calculated at checkout.

The Explore Scientific 2-Inch Rack & Pinion Focuser Extension Tube adds two inches of back-focus reach to your Explore Scientific rack-and-pinion focuser — handy when a diagonal, binoviewer, or camera train needs extra spacing to reach focus.

Building out your setup? See our guide to the telescope accessories every beginner needs.

Key features

  • Adds 2 inches of back-focus for accessories that need more reach
  • Fits Explore Scientific rack-and-pinion focusers
  • Solid metal construction for a rigid, light-tight connection

Specifications

Type Focuser extension tube
Length 2 inches
Fits Explore Scientific rack-and-pinion focusers
SKU ESRPEXT2

Frequently asked questions

When do I need an extension tube?
If an accessory can't quite reach focus, an extension tube adds spacing to bring the image into focus — useful with diagonals, binoviewers, and camera trains.

1-inch or 2-inch?
Use the shortest extension that reaches focus. This 2-inch tube adds more reach than the 1-inch version.

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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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All telescopes on Telescope Wolves are hand-picked with beginners in mind. If you're unsure which telescope is right for you, check out our Telescope Buying Guide.
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