Rack & Pinion 2" Focuser Extension Tubes

Rack & Pinion 2" Focuser Extension Tubes - View 3

Rack & Pinion 2" Focuser Extension Tubes - View 4

Rack & Pinion 2" Focuser Extension Tubes - View 5

Rack & Pinion 2" Focuser Extension Tubes - View 6

$17.99 ~~$29.99~~ In stock

Category: 對焦

描述

Explore Scientific 齒條與小齒輪調焦器延長管可為我們的 ED APO 望遠鏡上的 2 吋齒條與小齒輪調焦器增加 0.5" 或 1.5"。

付款前核對

可用付款方式和最終總額會在結帳頁顯示。

何時寄出

請同時考慮訂單處理和運送所需的時間。

Standard Shipping: 訂單處理（工作天） 0–1; 運送（工作天） 7–15.

Express Shipping: 訂單處理（工作天） 0–1; 運送（工作天） 7–15.

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需要退款時

詢問退款時，請向店舖提供訂單編號。

退貨前請聯絡客服確認退款處理時限。

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配送費用

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Standard Shipping · 美國: US$0.00

Express Shipping · 美國: US$3.99

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退貨前須知

寄回商品前，請先確認適用的退貨條件。

美國 · 退貨期限（簽收後天數）: 30. 退貨方式: 郵寄退貨. 退貨運費: 賣家承擔.

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Customer Reviews (4.8 / 5 · 5 reviews)

Joshua ★★★★★ Oct 21, 2026

Adding the 1.5" extension tube gave me just the right amount of back focus for my camera setup, and the rack-and-pinion mechanism feels smooth and precise.

Andrew ★★★★★ Oct 20, 2026

The 0.5" tube was a perfect fit for dialing in the focus on my triplet, and the rack and pinion mechanism feels precise and solid. I've had zero slipping since install.

Sofia Z. ★★★★★ Oct 19, 2026

The 1.5" extension tube let me finally reach focus with my binoviewer—threads are smooth and tight. No image shift or wobble when racking in and out. Exactly what I needed for my 2" focuser.