{"product_id":"orion-optics-uk-200mm-radius-blocks-each","title":"Orion Optics UK Radius Blocks for 200mm Scopes","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003ePrecision-machined for 200mm diameter optical tubes\u003c\/li\u003e\n\u003cli\u003eProvides a stable, non-flexing mounting point for accessories\u003c\/li\u003e\n\u003cli\u003eIdeal for finderscopes, guide scopes, and dovetail bars\u003c\/li\u003e\n\u003cli\u003eEnsures a perfect curvature match to your telescope\u003c\/li\u003e\n\u003cli\u003eSold individually\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eOrion Optics UK Radius Blocks for 200mm Scopes\u003c\/h2\u003e\n\u003cp\u003eSecurely 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.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Custom Fit for 200mm Optical Tubes\u003c\/h3\u003e\n\u003cp\u003eWhen 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.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the Orion Optics UK Radius Block for a 200mm scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy use a radius block instead of a flat adapter on my 200mm Newtonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA 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.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow many 200mm Radius Blocks do I need to mount a dovetail bar?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo securely mount a dovetail bar on top of your 200mm telescope, you will typically need \u003cstrong\u003etwo\u003c\/strong\u003e 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.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of accessories can I mount using this 200mm Radius Block?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThese blocks are designed to be a versatile mounting foundation. Common accessories mounted with them include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDovetail Bars:\u003c\/strong\u003e For mounting guide scopes, piggyback cameras, or other hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinder Scope Bases:\u003c\/strong\u003e To provide a more secure attachment than standard plastic bases.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuide Scope Rings:\u003c\/strong\u003e For a direct, low-profile guide scope setup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this 200mm Radius Block compatible with telescopes from other brands?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile 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.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eAre mounting screws included with the Orion Optics UK 200mm Radius Block?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eMounting 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.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003e200mm (8\") Diameter Optical Tubes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eOrion Optics UK Radius Block for 200mm Scopes\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942590148893,"sku":"OOUK-200MM-RADIUS-BLOCKS-EACH","price":100.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/OrionOpticsUK-Radius-blocks-to-fit-150mm-scope-1_bf821e21-b27c-475b-bff9-7e297fddee63.jpg?v=1789608167","url":"https:\/\/davidastro.com\/products\/orion-optics-uk-200mm-radius-blocks-each","provider":"David Astro","version":"1.0","type":"link"}