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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.

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Baader Planetarium Guidescope Rings (1 pair) – Size III, 140-185mm

SKU BAA-1500203
Original price $347.00 - Original price $347.00
Original price
$347.00
$347.00 - $347.00
Current price $347.00
Price Match Policy!
  • Designed for Tube Diameters from 140-185mm
  • Solid, Turned Aluminum Construction
  • Non-Rotating, Non-Marring V2A Steel Tips
  • Ball-Bearing Adjustment Mechanism
  • Multiple Accessory Mounting Points
  • Large, Easy-to-Grip Adjustment Knobs
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  • Description
  • FAQ
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  • Warranty
  • Guidescope Rings (1 pair) – Size III, 140-185mm

    Engineered for absolute stability, the Baader Planetarium Size III Guidescope Rings provide a robust, non-damaging mounting platform for guide telescopes with tube diameters from 140mm to 185mm. Machined from solid, turned aluminum with a 28mm width, these rings feature large adjustment knobs and unique ball-bearing tips that prevent slipping and protect your telescope's finish. The design ensures your guiding setup remains rigid and perfectly aligned throughout your imaging session.

    Ball-Bearing Tips: Secure Guiding Without Scratches

    The critical point of contact in any guidescope ring is the adjustment screw tip. These Baader rings utilize three M10 adjustment screws per ring, each equipped with a 10mm diameter, non-rotating tip. This tip features a V2A stainless steel ball-bearing surface covered by a hard rubber sheath, ensuring the pressure surface does not twist against your telescope's tube during adjustment.

    This innovative design provides two key benefits. First, it creates a solid, non-slip grip that prevents any shift in the guidescope's alignment. Second, it completely eliminates the risk of scratching, denting, or marring the finish of your optical tube, preserving the condition of your equipment.

    Solid Aluminum Body with Integrated ¼" Accessory Mounts

    The main body of each ring is machined from a single piece of solid aluminum for maximum rigidity and vibration suppression. The base includes a central ¼" photo-threaded connection and two additional 5mm through-holes, offering versatile and secure options for bolting the rings to any dovetail bar.

    For added functionality, four milled planar surfaces are integrated into the outer diameter of each ring. Each of these surfaces is tapped with a standard ¼" photo thread, allowing you to piggyback additional accessories like a finderscope, laser pointer, or a small wide-field camera directly onto your guide scope assembly.

  • How do the Baader Size III Guidescope Rings prevent scratching my telescope?

    The rings feature three M10 adjustment screws with non-rotating tips. Each tip has a ball-bearing surface made of V2A steel and is covered by a hard rubber sheath. Because the tip doesn't spin as you tighten it, it provides a firm grip without marring or scratching your telescope's tube.

    What are the mounting points on the outside of the Baader Size III rings for?

    The exterior of each ring has four milled flat surfaces with standard ¼" photo-threaded holes. These allow you to "piggyback" additional accessories, such as a finderscope, a small camera, or other aiming devices, directly onto the guidescope assembly.

    Are these Baader guidescope rings stable enough for long-exposure guiding?

    Yes. They are machined from solid, turned aluminum to be massive and rigid. This construction, combined with the 28mm wide profile and secure, non-slip adjustment screws, minimizes flexure and ensures your guide scope remains perfectly aligned throughout a long imaging session.

    Can I mount these Baader rings on a standard Vixen or Losmandy dovetail bar?

    Yes, the base of each ring is designed for versatile mounting. It includes a central standard ¼" photo-threaded connection and two additional 5mm through-holes, providing multiple options for securely bolting the rings to most common dovetail plates and bars.

    What is the benefit of the large knobs on the Baader Size III rings?

    The large, knurled adjustment knobs are designed for easy use, even when wearing gloves in cold weather. They provide excellent leverage, allowing you to make fine, controlled adjustments to the guidescope's alignment without requiring tools.

    If I'm using a heavy guidescope like a small refractor, will the Baader Size III rings hold it securely without flexure?

    Absolutely. The rings are engineered from solid aluminum for maximum rigidity. Their "massive" design is specifically intended to support heavier guide telescopes without introducing sag or flexure, which is critical for maintaining precise tracking during astrophotography.

  • Tube Diameter Range 140mm - 185mm
    Ring Width 28mm
    Construction Material Solid, turned aluminum
    Adjustment Screws 3x M10 per ring
    Screw Tip Diameter 10mm
    Screw Tip Material V2A steel ball-bearing with hard rubber sheath
    Base Mounting 1x ¼" photo thread, 2x 5mm through-holes
    Accessory Mounting 4x ¼" photo threads per ring
    Net weight (kg) 1.75
    Special Features ball bearing tips
    Screw Type 6x large handknobs
    Compatible Brands All Telescopes in given Tube sizes
    Tube Diameters 140 – 185 mm
    • Size III Guidescope Rings

      × 2

  • Baader Planetarium Warranty