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Starlight Instruments 2.0" Adapter Rack/Pinion Used to Attach to Any 2" Feather Touch Crayford Adapter or 2" Base

Starlight Instruments 2.0" Adapter Rack/Pinion Used to Attach to Any 2" Feather Touch Crayford Adapter or 2" Base

by Starlight Instruments
SKU SI-A20-3003-9
CA$182.00 - CA$182.00
CA$182.00
CA$182.00 - CA$182.00
CA$182.00
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  • Adapts 2" Feather Touch Rack & Pinion focusers for use with Crayford mounts
  • Compatible with all 2" Feather Touch Crayford focuser adapters
  • Compatible with all 2" Feather Touch Crayford focuser bases
  • Maintains precise alignment within the Starlight Instruments ecosystem
  • Precision-machined by Starlight Instruments in the USA
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  • Description
  • FAQ
  • Specifications
  • Warranty

  • Starlight Instruments 2.0" Rack & Pinion to Crayford Focuser Adapter

    This Starlight Instruments 2.0" Adapter is the essential mechanical bridge for upgrading your telescope's focusing system. It allows you to mount a heavy-duty 2" Feather Touch Rack & Pinion focuser directly onto any existing telescope adapter or base originally designed for the 2" Feather Touch Crayford model, ensuring a seamless transition without needing to replace your entire mounting hardware.

    Mount Your Rack & Pinion Focuser on Any 2" Crayford Base

    The primary reason to upgrade from a Crayford to a Rack & Pinion focuser is load capacity. For heavy imaging trains with large cameras, filter wheels, and off-axis guiders, the positive engagement of a rack and pinion drive prevents slippage. This adapter makes that upgrade simple by solving the difference in mounting patterns between the two focuser types.

    Instead of purchasing a new, telescope-specific mounting plate, you can use this adapter to attach your new Rack & Pinion focuser to your old Crayford base. This saves cost and complexity, allowing you to leverage the superior load-bearing capabilities of the Rack & Pinion design while retaining your existing, perfectly aligned hardware.

  • What is the primary use for this Starlight Instruments 2.0" Adapter?

    This adapter is designed for a single, specific purpose: to allow a Starlight Instruments 2" Rack & Pinion focuser to be mounted on any base or telescope-side adapter that was originally made for a Starlight Instruments 2" Crayford focuser.

    When would I need this adapter for my Feather Touch focuser?

    You would need this adapter if you are upgrading from a 2" Feather Touch Crayford focuser to a 2" Feather Touch Rack & Pinion model. The Rack & Pinion offers higher load capacity for heavy cameras, but has a different mounting pattern. This part bridges that gap, letting you use your new focuser with your old mounting base.

    How does this adapter help with a heavy imaging train on my Dobsonian?

    Many Dobsonians are fitted with a curved base for a 2" Crayford focuser. If you upgrade to the Rack & Pinion model to better support a heavy camera and coma corrector, this adapter lets you attach the new, stronger focuser to that existing curved base without needing to drill new holes or find a new custom base.

    Is this adapter compatible with both telescope-side adapters and Newtonian bases?

    Yes. The product description confirms it is designed to attach a 2" Rack & Pinion focuser to any 2" adapter (like those for refractors or SCTs) used on the Crayford focuser, as well as the 2" bases (like those for Newtonian reflectors).

    Does this adapter fit focusers other than Starlight Instruments?

    No. This is a proprietary part machined by Starlight Instruments specifically for their own ecosystem. It is intended only to adapt between their 2" Rack & Pinion and 2" Crayford mounting standards and is not designed for use with focusers from other manufacturers.

    Is this an official Starlight Instruments part?

    Yes. This is an authentic adapter manufactured by Starlight Instruments in the USA. It is machined to the same high tolerances as their focusers to ensure a secure, flex-free connection and maintain precise optical alignment.

  • Compatibility Adapts 2" Feather Touch Rack & Pinion focusers to mounts for 2" Feather Touch Crayford focusers
  • Starlight Instruments 2-Year Warranty