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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.
Orion Optics UK Radius Blocks for 200mm Scopes

Orion Optics UK Radius Blocks for 200mm Scopes

by Orion Optics UK
SKU OOUK-200MM-RADIUS-BLOCKS-EACH
$71.57 - $71.57
$71.57
$71.57 - $71.57
$71.57
Price Match Policy!
  • Precision-machined for 200mm diameter optical tubes
  • Provides a stable, non-flexing mounting point for accessories
  • Ideal for finderscopes, guide scopes, and dovetail bars
  • Ensures a perfect curvature match to your telescope
  • Sold individually
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Orion Optics UK Radius Blocks for 200mm Scopes

    Securely mount accessories to your 200mm Orion Optics UK telescope with this custom-machined Radius Block. Designed for a perfect curvature match, this 200mm block provides a rigid and stable platform for finderscopes, guide scopes, or other heavy equipment, eliminating the flexure common with flat-base adapters.

    A Custom Fit for 200mm Optical Tubes

    When mounting heavy accessories like a guide scope or a top-mounted dovetail bar, a secure connection to the optical tube is critical. This Orion Optics UK radius block is machined to precisely match the curve of a 200mm (8-inch) telescope tube, ensuring a flush fit with no gaps. This creates a far more stable and rigid connection than generic, flat-surfaced adapters, preventing tilt and flexure that can ruin an astrophoto or throw off alignment. These blocks are essential for building a solid imaging platform. Please note, this product is sold as a single block.

  • What is the purpose of the Orion Optics UK Radius Block for a 200mm scope?

    The 200mm Radius Block serves as a specialized adapter to mount accessories onto the curved surface of a 200mm (8-inch) optical tube. Its curved base perfectly matches the telescope's radius, providing a solid, stable, and flex-free platform for heavy items like guide scopes, finders, and dovetail bars.

    Why use a radius block instead of a flat adapter on my 200mm Newtonian?

    A flat adapter on a curved 200mm tube will only make contact at a single line, creating a pivot point that is prone to rocking, tilting, and flexure under load. A radius block makes full-surface contact, distributing the load evenly and creating a mechanically rigid connection that is essential for maintaining precise alignment in astrophotography.

    How many 200mm Radius Blocks do I need to mount a dovetail bar?

    To securely mount a dovetail bar on top of your 200mm telescope, you will typically need two radius blocks. This creates two stable contact points, preventing the bar from twisting or flexing along its length. This product is sold as a single block, so you would need to purchase a quantity of two for this application.

    What kind of accessories can I mount using this 200mm Radius Block?

    These blocks are designed to be a versatile mounting foundation. Common accessories mounted with them include:

    • Dovetail Bars: For mounting guide scopes, piggyback cameras, or other hardware.
    • Finder Scope Bases: To provide a more secure attachment than standard plastic bases.
    • Guide Scope Rings: For a direct, low-profile guide scope setup.

    Is this 200mm Radius Block compatible with telescopes from other brands?

    While designed for Orion Optics UK telescopes, this block should be compatible with any telescope that has a 200mm outer tube diameter. However, you must verify the hole spacing and hardware requirements for your specific telescope and accessory, as this may vary between manufacturers.

    Are mounting screws included with the Orion Optics UK 200mm Radius Block?

    Mounting hardware is not specified as being included with this block. You will need to source the appropriate screws or bolts based on the requirements of your optical tube and the accessory you intend to mount.

  • Compatibility 200mm (8") Diameter Optical Tubes

    • Orion Optics UK Radius Block for 200mm Scopes

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  • Orion Optics UK 1-Year Warranty