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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 to Fit 250mm Scope

Orion Optics UK Radius Blocks to Fit 250mm Scope

by Orion Optics UK
SKU OOUK-250MM-RADIUS-BLOCKS-EACH
$71.57 - $71.57
$71.57
$71.57 - $71.57
$71.57
Price Match Policy!
  • Designed to perfectly match 250mm diameter telescope tubes
  • Provides a stable, no-flex mounting surface for accessories
  • Prevents tube damage by distributing clamping pressure evenly
  • Authentic Orion Optics UK component for guaranteed compatibility
  • Sold individually to suit custom mounting configurations
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Qualifies for FREE Shipping in CONUS on orders over $350.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Radius Blocks to Fit 250mm Scope

    These genuine Orion Optics UK Radius Blocks are machined to perfectly match the curvature of a 250mm optical tube, providing an impeccably solid mounting point for dovetail bars, finder scopes, and other essential accessories.

    A Perfect Fit for 250mm Orion Optics UK Tubes

    When mounting hardware to a premium instrument, a generic, flat-surfaced accessory can create pressure points that damage the tube or lead to unstable connections. These radius blocks are engineered by Orion Optics UK specifically for their 250mm (10-inch) telescope tubes, ensuring the load is distributed evenly across a perfectly mated surface. This preserves the integrity of your optical tube while creating a rigid foundation for your equipment.

    Eliminate Flexure for 250mm Accessory Mounting

    Attaching a guide scope or heavy finder scope to a curved tube with improper hardware is a primary source of mechanical flexure, which can ruin long-exposure images. By creating a large, curved contact area, these blocks eliminate the single-point-of-contact instability inherent in flat mounting plates. Please note these blocks are sold individually, allowing you to build the custom mounting solution your imaging setup requires; for a typical dovetail bar, two blocks are needed.

  • Why do I need specific Radius Blocks for my 250mm Orion Optics UK scope?

    You need radius blocks specifically designed for a 250mm tube to ensure a perfect match with the tube's curvature. This perfect fit prevents creating stress points on the tube, distributes the weight of accessories evenly, and provides a rigid, flex-free mounting platform that generic flat hardware cannot offer.

    I'm mounting a heavy guide scope on my OOUK 250mm Newtonian. How do these blocks help?

    For a heavy guide scope on a 250mm Newtonian, these blocks are critical. They create a broad, curved contact surface that locks the mounting plate securely to the tube. This prevents the entire guide scope assembly from shifting, sagging, or flexing during an exposure, which is essential for maintaining sharp, pinpoint stars in your final image.

    How many Orion Optics UK Radius Blocks do I need to mount a dovetail bar?

    To securely mount a dovetail bar, you will typically need two radius blocks, one for each attachment point. As these blocks are sold individually, you must add two to your cart for this purpose.

    Can I use these 250mm blocks to mount a finder scope base?

    Yes, a single radius block provides an ideal, solid base for attaching a finder scope shoe to your 250mm telescope. It ensures the finder is mounted securely and maintains its alignment with the main optics far more reliably than a base mounted directly to the curved tube.

    What is the advantage of using an Orion Optics UK Radius Block over a generic part?

    The primary advantage is the guaranteed compatibility and perfect radius match for an Orion Optics UK 250mm telescope. This eliminates any guesswork and ensures a secure, professional-grade fit that protects your investment and maximizes the stability of your mounted accessories.

    Is mounting hardware included with the Radius Blocks for a 250mm scope?

    Mounting hardware such as screws, nuts, or bolts is not included. You will need to source the appropriate hardware for the specific accessory you intend to mount, as requirements vary between different dovetail bars, finder shoes, and other equipment.

  • Orion Optics UK 1-Year Warranty