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Starlight Instruments 2.0" Adapter for Any 2.0" Opening
Starlight Instruments 2.0" Adapter for Any 2.0" Opening
Starlight Instruments 2.0" Adapter for Any 2.0" Opening

Starlight Instruments 2.0" Adapter for Any 2.0" Opening

by Starlight Instruments
SKU SI-A20-220
CA$140.00 - CA$140.00
CA$140.00
CA$140.00 - CA$140.00
CA$140.00
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  • Adapts 2.0" Feather Touch focusers to standard 2.0" openings
  • Enables use of high-precision focusers on multiple telescopes
  • Securely holds the focuser via a compression ring mechanism
  • Designed for focusers with 1.5" or less drawtube travel
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  • Description
  • FAQ
  • Downloads
  • Warranty

  • Starlight Instruments 2.0" Adapter for Any 2.0" Opening

    The Starlight Instruments 2.0" Adapter allows you to mount a premium 2.0" Feather Touch focuser, such as the FTF2015BCR, into any telescope that accepts standard 2.0" accessories. This adapter is specifically engineered for focusers with a drawtube travel of 1.5" or less, as longer tubes will bottom out against the adapter's internal shoulder.

    Mount Your 2.0" Feather Touch Focuser in Any 2.0" Holder

    This adapter unlocks the ability to use your high-precision Feather Touch focuser on telescopes where a direct-threaded connection is not possible. By sliding into a standard 2.0" visual back or accessory holder, it provides a secure and stable platform for your focuser, allowing you to bring Starlight Instruments' renowned focusing accuracy to any scope in your collection with a 2.0" port.

    Critical Note: Understanding the 1.5" Drawtube Travel Limit

    This adapter has an internal physical stop. It is crucial to verify that your 2.0" Feather Touch focuser has a drawtube with 1.5 inches of travel or less. If your focuser's drawtube is longer, it will make contact with the inside of the adapter before reaching its full inward travel, which may prevent you from achieving focus, particularly at infinity.

    • Check Your Focuser: Before purchasing, confirm the drawtube travel of your specific 2.0" Feather Touch model.
    • Functionality: This design ensures a solid seating for shorter-travel focusers like the FTF2015BCR, but it is a hard limit for longer models.

  • What is the main purpose of the Starlight Instruments 2.0" Adapter?

    This adapter allows you to install a 2.0" Starlight Instruments Feather Touch focuser into any telescope or accessory holder that has a standard 2.0" opening with a compression ring or set screws. It provides a way to use your premium focuser on multiple instruments without needing a dedicated, threaded adapter for each one.

    Will this adapter work with my Feather Touch FTF2015BCR focuser?

    Yes, this adapter is explicitly designed to be compatible with focusers like the FTF2015BCR, which typically have 1.5" of drawtube travel. It provides a secure connection for this and other similar models.

    Why is there a warning about drawtubes longer than 1.5" for this 2.0" Adapter?

    The adapter is machined with an internal "shoulder" or stop. A focuser drawtube longer than 1.5 inches will physically hit this shoulder when you try to rack the focuser all the way in. This is a critical limitation that could prevent you from reaching focus.

    Can I use this Starlight Instruments 2.0" Adapter to put my Feather Touch focuser on my Celestron 8" SCT's visual back?

    Yes, provided your focuser's drawtube travel is 1.5" or less. A standard 2.0" visual back on an SCT is a perfect application for this adapter, allowing you to add the fine-focus precision of a Feather Touch for planetary imaging or visual use.

    I have a refractor with a stock 2.0" focuser. Can I use this adapter to add my Feather Touch for fine focusing on Jupiter?

    Absolutely. You can insert this adapter into your refractor's stock 2.0" drawtube (when racked in), and then mount your Feather Touch focuser into the adapter. This gives you a secondary, high-precision focuser ideal for the critical adjustments needed to resolve cloud bands on Jupiter, without replacing your telescope's entire stock focuser.

    What happens if I use a focuser with more than 1.5" of travel with this Starlight Instruments adapter?

    You will lose a portion of your focuser's inward travel. The drawtube will bottom out inside the adapter, stopping it from retracting further. This will likely shift your focus point outward and may make it impossible to focus on distant objects.

  • Starlight Instruments 2-Year Warranty