Skip to content
Price match 30-day returns* Talk to an astronomer before you buy
William Optics Cat Mounting Ring
William Optics Cat Mounting Ring
William Optics Cat Mounting Ring
William Optics Cat Mounting Ring
William Optics Cat Mounting Ring

William Optics Cat Mounting Ring

by William Optics
SKU WO-M-MR50RC-BL
Save 4% Save 4%
CA$69.00
CA$69.00 - CA$69.00
CA$69.00
CA$66.00
CA$66.00 - CA$66.00
CA$66.00
Price Match Policy!
  • Solid Aluminum Construction
  • Anodized Black Finish
Backordered
Request Stock Alert
Availability Info
Qualifies for FREE Shipping in Canada on orders over $500.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • William Optics Cat Mounting Ring

    The William Optics Cat Mounting Ring is a secure, custom-fit mounting ring for the William Optics Cat 51.

    Precision-Machined for the Cat 51

    This is not a one-size-fits-most solution. The William Optics Cat ring is made to fit the tube of the William Optics Cat 51.

    Because the fit is so precise, you must verify your telescope's dimensions before purchasing. Tube rings fit a very narrow range and will not fit a tube that exceeds the listed size by even 1 to 2 mm. We strongly advise using calipers to measure your optical tube directly rather than relying on published specifications, which can change between production runs.

    • Solid Aluminum Construction: Machined for a rigid hold on the Cat 51 tube.
    • Anodized Black Finish: Provides a durable, corrosion-resistant surface that matches William Optics' distinctive aesthetic.

  • Will the William Optics Cat Mounting Ring fit my telescope?

    William Optics makes this ring for the Cat 51 and does not list it for other telescopes. Because manufacturer specifications can change without notice, you must physically measure your telescope's tube with calipers to confirm the size before purchasing. Do not rely on published specs alone.

    Is the William Optics Cat Mounting Ring sold as a single unit or a pair?

    The William Optics Cat Mounting Ring is sold as a single unit. If you need a pair to mount a longer optical tube or a guide scope, you will need to purchase a quantity of two.

    I'm building a custom guide scope setup with a 50mm finder. Is this William Optics ring a good choice?

    This ring is the mounting ring for the Cat 51 telescope only, not for finders or guide scopes.

    What is the William Optics Cat Mounting Ring made of?

    It is machined from a single piece of solid aluminum and features a durable, anodized black finish.

  • SKU WO-M-MR50RC-BL
    Material Solid Aluminum
    Finish Anodized Black
    Kind Tube ring (single)
    Fits William Optics Cat 51 (RedCat 51, SpaceCat 51)

    • Cat Mounting Ring

      × 1

  • William Optics 2-Year Warranty