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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.
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.
PrimaLuceLab 100mm PLUS Support Rings

PrimaLuceLab 100mm PLUS Support Rings

by PrimaLuceLab
SKU PLL-PLLANSU100P
$225.00 - $225.00
$225.00
$225.00 - $225.00
$225.00
Price Match Policy!
  • Designed for 100mm Diameter Optical Tubes
  • Part of the Modular PrimaLuceLab PLUS System
  • Precision CNC-Machined from a Single Aluminum Block
  • Hard Anodized Finish for Increased Durability and Corrosion Resistance
  • Multiple Threaded Holes and Slots for Mounting Accessories
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • PrimaLuceLab 100mm PLUS Support Rings

    The PrimaLuceLab 100mm PLUS Support Rings provide a rigid, versatile mounting foundation for telescopes with 100mm optical tubes, such as the Sky-Watcher ED80 and ED100 refractors. Machined from a single block of aluminum, these rings are the starting point for integrating your telescope into the comprehensive PrimaLuceLab PLUS accessory ecosystem.

    The Foundation for 100mm Refractors

    These support rings are engineered specifically for optical tubes with a 100mm outer diameter, providing a secure and precise fit. By replacing the stock rings on telescopes like the Sky-Watcher ED80 or ED100, you unlock the ability to mount your instrument on a wider variety of mounts and add a rigid framework for imaging accessories.

    CNC-Machined Rigidity from a Single Aluminum Block

    Each ring is manufactured with high-precision CNC machines from a solid block of aluminum, eliminating flexure points found in cast or multi-part rings. The surface is sandblasted for a smooth finish and then hard-anodized, increasing the material's hardness and protecting it from oxidation and field wear. This robust construction ensures your optical system remains perfectly aligned, even when loaded with heavy cameras and guide scopes.

    Universal Connectivity for Plates, Guides, and More

    The key advantage of the PLUS rings is their array of threaded holes, counter-bored holes, and slots. This pattern allows you to directly attach PLUS System dovetail plates to both the top and bottom of the rings, creating a rigid structure for mounting guide scopes, control computers like the EAGLE, or other accessories. Central slots also offer compatibility, allowing you to attach plates or accessories from other manufacturers using standard screws.

  • What telescopes are compatible with the PrimaLuceLab 100mm PLUS Support Rings?

    These rings are designed for any telescope with an optical tube diameter of approximately 100mm. They are a confirmed fit for popular refractors like the Sky-Watcher ED80 and ED100.

    What is the PrimaLuceLab PLUS system?

    PLUS (Prima Luce Universal System) is a modular ecosystem of rings, plates, dovetail clamps, and other accessories designed to work together seamlessly. All components share a standardized pattern of threaded holes and slots, allowing you to build a rigid and versatile telescope setup with maximum flexibility and no custom drilling required.

    How do these 100mm PLUS rings improve my setup's rigidity?

    By being machined from a single block of aluminum and allowing you to bolt dovetail plates directly to both the top and bottom, the 100mm PLUS rings create a solid, box-like frame around your telescope. This significantly reduces mechanical flexure compared to standard cast rings that often only have a single point of contact with the mount's dovetail bar.

    Can I attach non-PrimaLuceLab accessories to these 100mm rings?

    Yes. While the threaded holes are optimized for other PLUS components, the rings also feature central slots. These slots allow you to use standard screws to attach plates, guide rings, or other mechanical accessories from different brands, offering a good degree of cross-compatibility.

    I have a Sky-Watcher ED80; how can I use the 100mm PLUS rings to add a guide scope?

    After installing the 100mm PLUS rings on your Sky-Watcher ED80, you can attach a PLUS Vixen or Losmandy-style plate to the top of the rings. On that top plate, you can then mount a set of PLUS guide rings holding your guide scope, creating a secure, parallel alignment for autoguiding.

    Can I use these 100mm PLUS rings to mount my 100mm refractor on a Losmandy-style mount?

    Absolutely. You would attach a PrimaLuceLab Losmandy-style dovetail plate (such as the 240mm or 350mm PLUS plates) to the bottom of the 100mm PLUS rings. This provides the correct interface to securely connect your telescope to any mount equipped with a Losmandy-D style saddle.

  • Internal Diameter 100mm
    Material CNC-Machined Aluminum Block
    Finish Sandblasted and Hard Anodized
    System Compatibility PrimaLuceLab PLUS
    Known Telescope Compatibility Sky-Watcher ED80, Sky-Watcher ED100
  • PrimaLuceLab 1-Year Warranty