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William Optics Saddle Plate for Vixen-Style Dovetail Plate - 90mm
William Optics Saddle Plate for Vixen-Style Dovetail Plate - 90mm
William Optics Saddle Plate for Vixen-Style Dovetail Plate - 90mm

William Optics Saddle Plate for Vixen-Style Dovetail Plate - 90mm

by William Optics
SKU WO-M-SP90RC-RD
CA$109.00 - CA$109.00
CA$109.00
CA$109.00 - CA$109.00
CA$109.00
Price Match Policy!
  • Length: 90 mm
  • Dovetail Type: Vixen-Style
  • Weight: 230 g (0.51 lbs)
  • Full-Length, Non-Marring Clamp
  • Signature William Optics Red Anodized Finish
1 in stock
Qualifies for FREE Shipping in Canada on orders over $500.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • William Optics Saddle Plate for Vixen-Style Dovetail Plate - 90mm

    Upgrade your mount with the William Optics 90mm Saddle Plate, engineered for a secure, non-marring connection with any Vixen-style dovetail. Weighing just 230g (0.51 lbs), this precision-machined saddle provides a rigid, full-surface clamp without adding significant mass to your portable imaging or observing setup.

    A 90mm Vixen Saddle with a Non-Marring Grip

    This saddle plate replaces basic, single-screw locks with a full-length clamping bar. This design makes contact along the entire 90 mm length of the saddle, distributing pressure evenly and creating a far more secure connection that prevents slipping and rotation. Most importantly, it protects the finish on your dovetail bars from the gouges and scratches common with single-bolt systems.

    Lightweight 230g Construction for Small Mounts

    At only 230 g, this saddle is an ideal upgrade for portable star trackers and small equatorial mounts where payload capacity is critical. The compact 90 mm length provides ample stability for wide-field refractors and telephoto lens setups without introducing unnecessary weight or leverage. While perfect for compact systems, users with longer optical tubes may prefer a longer saddle for additional stability.

    William Optics Saddle vs. Stock Single-Bolt Saddles: Security and Finish

    Many entry-level mounts are supplied with a simple saddle that uses one or two thumbscrews to hold the telescope. This William Optics saddle represents a significant upgrade in both function and form.

    • Contact Surface: A stock saddle's single bolt creates a single, high-pressure point of contact that can dent your dovetail and allow the telescope to pivot. The William Optics design clamps along a 90 mm surface, locking the equipment rigidly in place.
    • Equipment Care: The smooth, flat clamping bar glides against your dovetail, preserving its anodized finish. Stock bolts dig directly into the aluminum, permanently marking your gear.
    • Aesthetics: Finished in the signature William Optics red, this saddle adds a touch of professional build quality to your mount, matching the fit and finish of their premium telescopes.

  • What is the advantage of the William Optics 90mm Saddle Plate over my mount's stock saddle?

    The primary advantage is security and equipment care. Its full-length clamping bar provides a much larger contact area than a simple thumbscrew, preventing your telescope from slipping or rotating. This design also avoids scratching or denting your Vixen-style dovetail bars, preserving your equipment's condition.

    Will the William Optics 90mm Saddle Plate fit on my Sky-Watcher Star Adventurer Pro?

    Yes, this is a very popular upgrade for portable trackers like the Star Adventurer and iOptron SkyGuider Pro. Its low weight of 230 g ensures it doesn't overburden the tracker's payload capacity, while providing a much more stable and reliable mounting platform than the standard ball head or small Vixen clamp.

    Does this William Optics saddle prevent marks on my Vixen dovetail bars?

    Yes. The saddle uses a flat, smooth clamping mechanism that presses firmly against the dovetail bar instead of a pointed screw that digs into it. This non-marring design is a key feature for astronomers who want to keep their equipment in pristine condition.

    Is the 90mm length of this saddle plate sufficient for a small refractor like a RedCat 51?

    Absolutely. The 90 mm length is an excellent match for compact, wide-field refractors like the William Optics RedCat, Zenithstar, or similar telescopes. It provides a very secure base for imaging and visual use without being excessively large or heavy for the telescope.

    What tools are needed to install the William Optics Saddle Plate?

    Installation typically requires standard metric hex keys (Allen wrenches) to attach the saddle to your specific mount head. The required bolts and their sizes depend on the mount you are attaching it to. Mounting hardware is generally not included with the saddle itself.

    Is this William Optics saddle compatible with Losmandy D-style dovetail plates?

    No. This saddle is designed exclusively for the narrower Vixen-style dovetail standard. It will not accept the wider Losmandy D-style plates.

  • Length 90 mm
    Dovetail Type Vixen
    Weight 230 g / 0.51 lbs

    • William Optics Saddle Plate for Vixen-Style Dovetail Plate - 90mm

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  • William Optics 2-Year Warranty