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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.
Baader Guide Scope Rings BP II - 110-160mm
Baader Guide Scope Rings BP II - 110-160mm
Baader Guide Scope Rings BP II - 110-160mm
Baader Guide Scope Rings BP II - 110-160mm
Baader Guide Scope Rings BP II - 110-160mm
Baader Guide Scope Rings BP II - 110-160mm
Baader Guide Scope Rings BP II - 110-160mm

Baader Guide Scope Rings BP II - 110-160mm

by Baader Planetarium
SKU BAA-1500202
$246.00 - $246.00
$246.00
$246.00 - $246.00
$246.00
Price Match Policy!
  • Accommodates Tube Diameters from 110mm to 160mm
  • Massive 28mm Ring Width for High Rigidity
  • Three M10 Adjustment Screws Per Ring
  • 10mm Non-Rotating, Ball-Bearing Steel Tips
  • Base Mounting via ¼" Thread or 5mm Holes
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Baader Guide Scope Rings BP II - 110-160mm

    This pair of Baader Guide Scope Rings BP II securely holds optical tubes from 110mm to 160mm in diameter, utilizing a massive 28mm wide turned aluminum construction for absolute rigidity against flexure. Each ring features three M10 adjustment screws with large knobs, terminating in 10mm diameter, non-rotating, ball-bearing tips made from V2A steel to prevent slipping or scratching your guide scope. Mounting is handled by a central ¼" photo thread and two 5mm through-holes, while four additional photo-threaded holes on the outer diameter allow for flexible accessory attachment.

    Secure Mounting for Tubes from 110mm to 160mm

    Engineered from solid, turned aluminum, these Baader rings provide a mechanically stable platform for guide scopes and secondary instruments with tube diameters between 110mm and 160mm. The substantial 28mm width of each ring creates a broad contact area, distributing the load and minimizing mechanical flexure—a critical factor for maintaining precise guiding accuracy over long exposures.

    Non-Rotating 10mm Ball-Bearing Tips: Precision Without Scratches

    The standout feature of the BP II rings is the design of the three M10 adjustment screws. Each screw is tipped with a 10mm V2A steel surface that makes contact with the guide scope. Thanks to an internal ball-bearing mechanism, this tip does not rotate as you tighten the screw, eliminating the risk of twisting the guide scope out of alignment or marring its finish. A hard rubber sheath provides a non-slip grip that holds your instrument securely without causing damage.

    Versatile Mounting: ¼" Threads and 5mm Through-Holes

    Baader ensures broad compatibility by incorporating multiple mounting options. The base of each ring has a central ¼" photo-threaded hole for direct attachment to dovetail bars and saddles, flanked by two 5mm through-holes for custom bolt-on solutions. Additionally, four milled planar surfaces on the outer diameter of each ring feature their own photo-threaded holes, allowing you to piggyback accessories like a finder scope or control box directly onto the ring system.

    Baader BP II Rings vs. Standard Guide Rings: A Mechanical Advantage

    While standard guide rings with simple nylon-tipped screws may be sufficient for smaller guide scopes, they introduce potential sources of error. The Baader BP II rings are an engineering solution to common guiding problems.

    • Rotational Shift: Standard screws can twist the guide scope as they are tightened, slightly altering alignment. The BP II's non-rotating, ball-bearing tips prevent this entirely.
    • Mechanical Flexure: The massive 28mm width and solid aluminum build of the BP II rings provide superior rigidity compared to narrower, less substantial rings, which can flex under the weight of a heavier instrument.
    • Secure Grip: The V2A steel and rubber tips offer a more positive, non-slip grip than simple nylon screws, ensuring your guide scope does not shift during a long imaging session.

  • How do the Baader BP II Guide Scope Rings prevent scratching my telescope tube?

    The Baader BP II rings use a unique adjustment screw design. The 10mm V2A steel tips are covered with a hard rubber sheath, providing a firm but non-marring contact surface. Critically, the tips are mounted on a ball-bearing system, so they do not rotate as you tighten them, preventing any grinding or twisting motion against the telescope's finish.

    What is the advantage of the non-rotating tips on the Baader BP II adjustment screws?

    The primary advantage is precision. When a standard screw tip rotates against a tube, it can cause the tube to shift or twist slightly, throwing off your guide star alignment. The non-rotating design of the Baader BP II rings ensures that the only motion is linear, pressing the scope securely into place without altering its pointing direction.

    What are the mounting options on the base of the Baader Guide Scope Rings BP II?

    Each ring offers two primary mounting methods on its base: a central ¼" standard photo thread for easy attachment to most astronomical dovetail bars, and two 5mm diameter through-holes for a more permanent, custom-bolted connection.

    Can I mount other accessories onto the Baader BP II rings themselves?

    Yes. Each ring has four milled planar surfaces on its outer circumference, and each surface is equipped with a standard photo-threaded hole. This allows you to attach additional accessories like finder scopes, laser pointers, or small control units directly to the rings.

    I plan to use a 6" f/4 Newtonian (approx. 150mm tube diameter) as a wide-field astrograph piggybacked on my main telescope. Are the Baader BP II rings rigid enough for this?

    Absolutely. The 110-160mm range of the Baader BP II rings is perfect for a 150mm tube. Their massive 28mm width and solid aluminum construction are specifically designed to prevent flexure, making them an ideal choice for securely mounting a relatively heavy instrument like a 6" Newtonian for imaging.

    How do I attach the Baader BP II Guide Scope Rings to a standard Vixen or Losmandy dovetail bar?

    The easiest method is to use the central ¼" threaded hole on the bottom of each ring. You will need two ¼"-20 screws of appropriate length to thread up from the bottom of your dovetail bar into the base of the rings. This provides a secure and standard connection.

  • Compatible Tube Diameter 110mm - 160mm
    Ring Width 28 mm
    Ring Material Turned Aluminum
    Adjustment Screws 3x M10 per ring
    Screw Tip Diameter 10 mm
    Screw Tip Design Ball-bearing, non-rotating
    Screw Tip Material V2A Steel with rubber sheath
    Base Mounting 1x ¼" photo thread, 2x 5mm through-holes
    Accessory Mounting 4x ¼" photo threads
    Quantity 2 rings per set
    Net weight (kg) 1.03
    Special Features ball bearing tips
    Screw Type 6x large handknobs
    Compatible Brands All Telescopes in given Tube sizes
    Tube Diameters 110 – 160 mm

    • Baader Guide Scope Rings BP II (110-160mm)

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  • Baader Planetarium Warranty