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Orion Telescopes
Orion 2" Precision Centering Extension Adapter
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This product is no longer available for purchase.
  • Handy extension adapter with helical compression mechanism
  • Precisely centers 2" eyepieces and accessories in a 2" telescope focuser
  • Avoid set-screw marks and scratches on your 2" telescope eyepieces and accessories
  • Ideal for accurate collimation tool use in reflector telescopes
  • Adds 1.7" (43mm) of extension

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Item #  52087

The Orion 2" Precision Centering Extension Adapter allows you to accurately center any 2" eyepiece or accessory in a 2" telescope focuser. Most standard 2" focusers use a metal thumbscrew to secure an inserted eyepiece or accessory in place, which pushes the inserted barrel laterally, i.e., off-center. This can make observations less than ideal, and can reduce the usefulness of collimating tools. The Orion 2" Precision Centering Extension Adapter employs a nylon helical compression mechanism that precisely centers the inserted accessory as it is tightened in place. The adapter fits in all 2" focusers and will not scratch your inserted accessories with its nylon compression ring.

The Orion 2" Precision Centering Extension Adapter is especially useful for centering 2" eyepieces and imaging cameras on the center axis of a telescope’s light path. The adapter also provides 1.7" of extension which is often needed when a star diagonal is not used with refractor or cassgrain telescopes. It’s also ideal with reflector telescopes for critical centering of a collimating device.The Precision Centering Extension Adapter will securely house up to 1.3" of inserted 2" eyepiece barrels and accessories.

Made of machined, anodized aluminum with a knurled twist-lock ring, the Precision Centering Extension adapter adds 1.7" (43mm) of extension.


Limited Warranty against defects in materials or workmanship for one year from date of purchase. This warranty is for the benefit of the original retail purchaser only. For complete warranty details contact us at 800-676-1343.

Orders received by 1pm Eastern Standard Time for in-stock item the same business day. Order received after noon will ship the next business day. When an item is not in-stock we will ship it as soon as it becomes available. Typically in-stock items will ship first and backordered items will follow as soon as they are available. You have the option in check out to request that your order ship complete, if you'd prefer.


This product is available to ship Standard delivery within the 50 US states, APO/DPO/FPO addresses and US territories/protectorates. Delivery is not available to Canada.

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