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Explore Scientific 2" Extension Tube for Rack & Pinion Focuser - ESRPEXT2

Explore Scientific 2" Extension Tube for Rack & Pinion Focuser - ESRPEXT2 - Main image
$25.89 $34.99 In stock

Category: Telescope Accessories

Explore Scientific 2" Extension Tube for Rack & Pinion Focuser

This extension tube adds 2" of spacing to Rack & Pinion style focusers. An extension tube is useful because it adds extra focuser back travel. This is often essential for short-range terrestrial viewing or astro-imaging.

An affordable and versatile accessory!

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

George T. ★★★★★

Finally got the spacing right for my eyepiece to reach focus—that extra 2" made all the difference. The build quality is solid and it threads on smoothly without any wobble.

Michael X. ★★★★★

This extension tube fit perfectly on my focuser threads and gave me just the in-focus I needed for my new camera setup. The 2" length feels solid and machined, with no wobble or play at all.

Penelope P. ★★★★★

I needed a bit more clearance between my eyepiece and the focuser, and this tube clicks in solidly with no wobble. The machining on the inner edge is smooth, and it doesn't introduce any extra play in the drawtube travel.