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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.
Starlight Instruments 2.0" Adapter for Celestron C70 Telescope
Starlight Instruments 2.0" Adapter for Celestron C70 Telescope

Starlight Instruments 2.0" Adapter for Celestron C70 Telescope

by Starlight Instruments
SKU SI-A20-224
$150.00 - $150.00
$150.00
$150.00 - $150.00
$150.00
Price Match Policy!
  • Adapts Celestron C70 refractors to accept 2.0" focusers
  • Enables use of Starlight Instruments Feather Touch focusers
  • Allows for 2.0" diagonals and wide-field eyepieces
  • Precision-machined in the USA for a secure, no-slip fit
  • Unlocks fine-focusing capability for a portable telescope
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  • Description
  • FAQ
  • Warranty

  • Starlight Instruments 2.0" Adapter for Celestron C70 Telescope

    This Starlight Instruments adapter is the essential component for upgrading your Celestron C70 refractor to accept a precision 2.0" Feather Touch focuser, enabling far greater focusing accuracy and the use of larger 2.0" eyepieces for wider fields of view.

    Upgrade Your C70 with a 2.0" Feather Touch Focuser

    The Celestron C70 is a capable, portable spotting scope, but its stock focuser is not designed for the precision required by astronomy. This adapter allows you to replace the original unit with a Starlight Instruments 2.0" Feather Touch focuser, transforming the instrument's capabilities. With a Feather Touch focuser installed, you gain dual-speed, zero-image-shift focusing that makes achieving critical sharpness on celestial targets possible.

    Moving to the 2.0" format also removes the limitations of the C70's stock 1.25" visual back. You can now use 2.0" diagonals and eyepieces, unlocking significantly wider true fields of view. This makes it easier to frame large star clusters and nebulae, turning your C70 into a more versatile instrument for rich-field sweeping. Machined from high-grade aluminum by Starlight Instruments in the USA, this adapter ensures a rigid, reliable connection between your telescope and a high-end focuser.

  • Which Starlight Instruments focuser does this 2.0" adapter fit?

    This adapter is designed to mount Starlight Instruments' 2.0" Feather Touch focusers, such as their Crayford or Rack-and-Pinion models, onto the optical tube of a Celestron C70 refractor.

    Why would I upgrade the focuser on my Celestron C70 with this adapter?

    Upgrading allows you to overcome the two main limitations of the stock C70: imprecise focusing and a 1.25" barrel size. A Feather Touch focuser provides the fine control needed for astronomical viewing, while the 2.0" format allows the use of wide-field eyepieces for more expansive views of the night sky.

    Is installation of this Starlight Instruments C70 adapter difficult?

    Installation is typically straightforward for users comfortable with minor hardware changes. It involves unthreading the stock focuser assembly from the rear of the C70 optical tube and securely threading this adapter in its place. The new 2.0" focuser then attaches to the adapter.

    Will this adapter let me use 2.0" diagonals and eyepieces on my C70?

    Yes. When you pair this adapter with a 2.0" focuser (sold separately), it completes the optical train needed to use 2.0" diagonals and eyepieces. This is the primary reason for the upgrade, as it allows for a much wider true field of view than the standard 1.25" accessories.

    Can I use this adapter and a 2.0" focuser to view the entire Pleiades (M45) with my Celestron C70?

    Yes, this is an excellent application. The main benefit of converting the Celestron C70 to a 2.0" format is to use low-power, wide-field 2.0" eyepieces. These can frame large targets like the Pleiades (M45) or the Andromeda Galaxy (M31), which are often too expansive to fit within the view of a 1.25" eyepiece at the C70's focal length.

    How does this Starlight Instruments adapter improve imaging with a Celestron C70?

    While the Celestron C70 is not a primary imaging telescope, this adapter is the first step to making it viable for simple imaging, like capturing the Moon or bright planets. A Feather Touch focuser provides the critical, backlash-free micro-focusing adjustments necessary to achieve a sharp image on a camera sensor, something the stock focuser cannot do reliably.

  • Starlight Instruments 2-Year Warranty