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Starlight Instruments 2.0" Adapter for Older William Optics Megrez 90

Starlight Instruments 2.0" Adapter for Older William Optics Megrez 90

by Starlight Instruments
SKU SI-A20-226
CA$224.00 - CA$224.00
CA$224.00
CA$224.00 - CA$224.00
CA$224.00
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  • Connects a 2.0" Feather Touch Focuser to an older William Optics Megrez 90
  • Precision-machined for a secure, perfectly aligned fit
  • Enables a critical upgrade for astrophotography
  • Replaces the original stock focuser assembly
  • Manufactured by Starlight Instruments in the USA
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  • Description
  • FAQ
  • Warranty

  • Starlight Instruments 2.0" Adapter for Older William Optics Megrez 90

    This Starlight Instruments adapter is the essential, precision-machined component required to replace the stock focuser on your older William Optics Megrez 90 refractor with a world-class 2.0" Feather Touch focuser, unlocking superior stability and focusing accuracy for imaging.

    Upgrade Your Megrez 90 with 2.0" Feather Touch Precision

    The William Optics Megrez 90 is a respected optical system, but for demanding astrophotography, the stock focuser can be a limiting factor. This adapter allows you to install a 2.0" Starlight Instruments Feather Touch focuser, transforming your telescope's imaging capability.

    With a Feather Touch focuser installed, you gain the ability to handle heavy imaging trains without sag or flex. The legendary dual-speed mechanism provides the fine control necessary to achieve critical focus, eliminating the image shift and backlash common in standard focusers.

    A Purpose-Built Adapter for Older Megrez 90 Models

    This is not a universal-fit component. It has been specifically designed by Starlight Instruments to create a seamless mechanical connection between their 2.0" focusers and the optical tube of older-generation William Optics Megrez 90 telescopes.

    • Perfect Alignment: The adapter ensures the focuser is perfectly orthogonal to the optical axis, a critical requirement for sharp stars across the entire field of view.
    • Compatibility Note: This part is intended exclusively for older models of the Megrez 90. It may not be compatible with newer versions of the telescope. Please verify your telescope model before purchasing.

  • What is the purpose of this Starlight Instruments adapter for the Megrez 90?

    This adapter's sole purpose is to allow you to remove the factory-installed focuser from an older William Optics Megrez 90 telescope and replace it with a high-precision Starlight Instruments 2.0" Feather Touch focuser. This is a common upgrade for astrophotographers seeking better load capacity and finer focus control.

    Which 2.0" Feather Touch focuser should I pair with this adapter for imaging planets like Jupiter with my Megrez 90?

    For planetary imaging with a Megrez 90, a 2.0" Feather Touch Crayford (FTF20xxBCR series) is an excellent choice. Its smooth, precise control is ideal for achieving the critical focus needed to resolve fine details like the cloud bands of Jupiter or the Cassini Division in Saturn's rings, even at high magnification.

    Will this adapter fit newer William Optics Megrez 90 telescopes?

    No, this adapter is specifically machined for older models of the William Optics Megrez 90. Telescope manufacturers sometimes change the mechanical design of their tubes and focuser mounting points between production runs. This adapter is not guaranteed to fit newer or current-generation models.

    Why upgrade the stock focuser on my William Optics Megrez 90 for imaging the Orion Nebula (M42)?

    Imaging a target like the Orion Nebula (M42) requires a focuser that can handle the weight of a camera, filter wheel, and guide scope without flexing or slipping. A Starlight Instruments Feather Touch focuser, installed with this adapter, provides that stability. Its fine-focus control also allows you to achieve perfectly sharp stars, resolving the Trapezium cluster at the nebula's core without compromising the faint outer nebulosity.

    Is installation of this Starlight Instruments adapter difficult?

    Installation typically involves unthreading the stock focuser from the rear cell of the telescope and threading this adapter in its place. The Feather Touch focuser then attaches to the adapter. While generally straightforward for users comfortable with their equipment, we recommend consulting the manuals for both your telescope and the focuser. If you are uncertain, seeking assistance from an experienced technician is advised.

    Can I use this adapter to mount other brands of 2.0" focusers on my Megrez 90?

    This is not recommended. The adapter is designed to match the specific mounting hole pattern and flange dimensions of Starlight Instruments 2.0" focusers. While other focusers may have a 2.0" barrel, their bodies will likely not attach securely or in proper alignment with this adapter.

  • Starlight Instruments 2-Year Warranty