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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
Starlight Instruments True 3.0" End Cap w/ 2.0" Compression Ring Opening

Starlight Instruments True 3.0" End Cap w/ 2.0" Compression Ring Opening

by Starlight Instruments
SKU SI-EC32-3205-1
$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00
Price Match Policy!
  • Adapts True 3.0" Feather Touch focusers to use 2.0" accessories
  • Features a non-marring brass compression ring
  • Provides a secure, rigid connection for heavy eyepieces and cameras
  • Machined by Starlight Instruments for a perfect fit
  • Replaces the standard end cap for a direct, flexure-free interface
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  • Description
  • FAQ
  • Warranty

  • Starlight Instruments True 3.0" End Cap w/ 2.0" Compression Ring Opening

    The Starlight Instruments True 3.0" End Cap provides a robust, native connection for all your 2.0" accessories, directly adapting the large-format drawtube of a Feather Touch focuser. This component replaces the focuser's standard end cap, creating a secure, single-piece interface for 2.0" diagonals, eyepieces, and camera nosepieces without the flexure of a separate step-down adapter.

    Secure Your 2" Eyepieces in a True 3.0" Feather Touch Focuser

    This end cap is the factory-grade solution for integrating your collection of 2.0" accessories with the premiere True 3.0" Feather Touch focuser. By threading directly onto the focuser's drawtube, it becomes an integral part of the optical train. This ensures perfect alignment and stability, allowing you to switch between 2.0" eyepieces, diagonals, and imaging cameras with confidence.

    Brass Compression Ring: A Non-Marring Grip for Your 2" Accessories

    Instead of relying on a single thumbscrew that can scratch and misalign your valuable accessories, this end cap utilizes a soft brass compression ring. As you tighten the thumbscrews, the ring gently and evenly closes around the barrel of your eyepiece or camera nosepiece. This mechanism distributes pressure uniformly, creating a secure, slip-free grip that protects your equipment from damage while maintaining precise centering.

    Why an End Cap? Rigidity for Heavy 2" Diagonals and Cameras

    While a simple drop-in adapter can connect 2.0" accessories, it introduces a potential point of flexure and tilt, especially with heavy equipment. This Starlight Instruments end cap eliminates that weakness. By creating a single, solid component, it maximizes the rigidity of your imaging train, which is critical for astrophotography where any amount of tilt can compromise focus across the sensor.

  • What is the purpose of the Starlight Instruments True 3.0" End Cap?

    This end cap allows you to securely use standard 2.0" accessories, such as eyepieces, diagonals, and camera nosepieces, with a Starlight Instruments True 3.0" Feather Touch focuser. It threads directly onto the drawtube for a rigid, native connection.

    Will this Starlight Instruments end cap fit any 3.0" focuser?

    No. This end cap is specifically designed for the Starlight Instruments "True 3.0"" line of Feather Touch focusers. It will not fit other brands or even other 3.0" class focusers from Starlight Instruments that do not use the "True 3.0"" specification. Always verify your focuser model before purchasing.

    How does the compression ring on this 2.0" opening work?

    The end cap contains an internal brass ring. When you tighten the thumbscrews, they push this ring inward, causing it to clamp down evenly around the entire circumference of your 2.0" accessory barrel. This provides a much more secure and non-damaging grip than a single set screw.

    Why should I use this end cap instead of a generic 3" to 2" adapter for my Feather Touch focuser?

    This end cap offers superior rigidity. A drop-in adapter creates an additional mechanical junction held by set screws, which can introduce flex or tilt, especially with a heavy camera or diagonal. By threading directly onto the drawtube, this end cap creates a single, solid unit, which is critical for maintaining alignment in demanding imaging applications.

    I want to use my 2" Tele Vue diagonal with my new True 3.0" Feather Touch focuser on my refractor. Is this the right part?

    Yes, this is exactly the correct component for that scenario. It will allow you to securely mount your 2" Tele Vue diagonal directly to the True 3.0" focuser, ensuring a stable and perfectly aligned optical path for visual observation.

    Can I use this end cap for astrophotography with a 2" camera nosepiece on my Newtonian?

    Absolutely. This is an ideal solution for imaging. The rigidity provided by the direct-thread connection and the secure grip of the brass compression ring will help prevent any tilt in your imaging train, ensuring your camera sensor remains perfectly orthogonal to the light path for sharp stars across the field.

  • Starlight Instruments 2-Year Warranty