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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 350mm Telescopes

Orion Optics UK Radius Blocks for 350mm Telescopes

by Orion Optics UK
SKU OOUK-350-400-MM-RADIUS-BLOCKS
$71.57 - $71.57
$71.57
$71.57 - $71.57
$71.57
Price Match Policy!
  • Provides a stable, flat mounting surface on a curved tube
  • Precisely machined to match the radius of a 350mm telescope
  • Ideal for attaching dovetail bars, guide scopes, and handles
  • Prevents tube flexure and ensures a secure accessory connection
  • Sold individually to suit custom mounting configurations
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Orion Optics UK Radius Blocks for 350mm Telescopes

    These Orion Optics UK Radius Blocks are machined to precisely match the curvature of a 350mm telescope optical tube. By creating a solid, flat mounting point on a curved surface, they provide the ideal interface for securely attaching heavy accessories without flexing or damaging the tube. This component is essential for mounting dovetail plates, guide scope rings, or carrying handles with rock-solid stability.

    A Custom-Fit Mounting Platform for 350mm Optical Tubes

    Attaching a flat dovetail bar directly to a curved 350mm optical tube creates stress points and an unstable connection that can shift during use. These radius blocks solve that problem by forming a perfect bridge between the tube's circular profile and the flat base of your accessory. The matched curvature distributes the load evenly, ensuring your equipment stays perfectly aligned and secure.

    • Eliminates Flexure: Prevents the flexing and potential tube deformation that can occur when tightening bolts against a curved surface, preserving optical alignment.
    • Versatile Mounting: Provides a standardized flat surface for attaching a wide range of accessories, from heavy-duty dovetail plates to finder scope brackets.
    • Sold Individually: Blocks are supplied as single units, allowing you to purchase the exact number required for your specific mounting project, whether it's two for a handle or four for a full-length plate.

  • What is the purpose of the Orion Optics UK 350mm Radius Block?

    The Orion Optics UK 350mm Radius Block is designed to create a solid, flat mounting surface on a curved 350mm diameter optical tube. This allows you to securely attach accessories with flat bases, such as dovetail bars or guide scope rings, without causing stress, flex, or damage to the telescope tube.

    How many 350mm Radius Blocks do I need to buy?

    These radius blocks are sold individually. The number you need depends on your application. For a short dovetail bar or a carrying handle, two blocks are typically sufficient. For a full-length top or bottom dovetail plate, you will likely need four blocks for maximum stability.

    Are mounting bolts included with the Orion Optics UK 350mm Radius Block?

    Mounting hardware is not specified as being included. You will need to source bolts of the appropriate length and thread for your specific telescope tube and the accessory you are mounting.

    Can I use these 350mm Radius Blocks on a telescope from another brand?

    Yes, as long as your telescope's optical tube has an outer diameter of approximately 350mm, these blocks should provide a suitable fit. They are not proprietary to Orion Optics UK telescopes.

    I have an Orion Optics UK CT14 (a 350mm Newtonian). Will these 350mm Radius Blocks provide a stable base for my guide scope rings?

    Absolutely. The CT14 has a 350mm tube, and these blocks are designed for that exact curvature. Using a pair of these blocks will create the ideal stable, flat platform for attaching guide scope rings, ensuring your autoguiding setup is rigid and free of flex.

    Can I use these 350mm Radius Blocks to attach a Losmandy-style dovetail plate to my 350mm dobsonian tube?

    Yes, this is an excellent application for these blocks. By placing four 350mm Radius Blocks between the dobsonian tube and a long Losmandy-style plate, you create a very strong, evenly supported connection. This is critical for mounting the tube on an equatorial platform or a different mount system.

  • Compatible Telescope Diameter 350mm
  • Orion Optics UK 1-Year Warranty