{"product_id":"orion-optics-uk-300mm-radius-blocks-each","title":"Orion Optics UK Radius Blocks for 300mm Scopes","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDesigned for 300mm Diameter Telescope Tubes\u003c\/li\u003e\n\u003cli\u003eProvides a Stable, Curved Mounting Surface\u003c\/li\u003e\n\u003cli\u003eDistributes Clamping Force to Prevent Tube Damage\u003c\/li\u003e\n\u003cli\u003eIdeal for Attaching Tube Rings or Dovetail Plates\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 300mm Scopes\u003c\/h2\u003e\n\u003cp\u003eSecure your Orion Optics UK 300mm optical tube with these purpose-built Radius Blocks, designed as a stable, non-marring mounting point for tube rings and other accessories.\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 Stable Foundation for Your 300mm Telescope\u003c\/h3\u003e\n\u003cp\u003eRadius blocks are essential for safely attaching mounting hardware to a curved telescope tube. These blocks are precisely shaped to match the curvature of a 300mm OTA, creating a large, stable contact area for dovetail bars or tube rings. This design distributes clamping force evenly across the tube wall, preventing dents and ensuring a rigid, flex-free connection critical for astrophotography.\u003c\/p\u003e\n\u003cp\u003ePlease note that these blocks are sold individually. A typical setup for mounting a telescope requires at least two blocks to create a stable platform.\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 300mm Radius Blocks?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTheir primary purpose is to create a flat, stable surface on a curved 300mm telescope tube for mounting accessories like tube rings or dovetail plates. They conform to the tube's radius, distributing pressure to prevent damage and ensure a rigid connection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow many 300mm Radius Blocks do I need to mount my Orion Optics UK telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThese blocks are sold individually. For most applications, such as mounting a telescope to a dovetail bar via tube rings, you will need a minimum of \u003cstrong\u003etwo radius blocks\u003c\/strong\u003e—one for each mounting point.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eAre the Orion Optics UK 300mm Radius Blocks compatible with other telescope brands?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThese blocks are designed specifically for the curvature of Orion Optics UK 300mm tubes. While they may fit other telescope tubes with an identical 300mm outer diameter, a perfect mating surface is only guaranteed with the intended Orion Optics UK models.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo the Orion Optics UK 300mm Radius Blocks include mounting hardware?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, mounting hardware such as bolts or screws is not included. You will need to source the appropriate hardware for your specific tube rings, dovetail plate, and telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I use the 300mm Radius Blocks to attach a Losmandy-style dovetail plate to my Orion Optics UK Newtonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou would typically place one block under each of your two tube rings, between the ring and the dovetail plate. The curved side of the block sits on the telescope tube inside the ring, and the flat side of the ring bolts through to the dovetail plate, creating a solid, curved sandwich that protects the tube.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill these radius blocks help stabilize a heavy imaging setup on my 300mm Orion Optics UK scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. By creating a larger, more stable contact area between your mounting rings and the telescope tube, these blocks significantly increase rigidity. This helps to minimize flexure, which is critical when using a heavy camera, filter wheel, and off-axis guider for long-exposure astrophotography.\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\u003eCompatible Tube Diameter\u003c\/td\u003e\n\u003ctd\u003e300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eOrion Optics UK\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\"\u003eRadius Block for 300mm Scope\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":52942592114973,"sku":"OOUK-300MM-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_6d7b333b-3c1b-4b89-b3f2-040b02b0e896.jpg?v=1789608183","url":"https:\/\/davidastro.com\/products\/orion-optics-uk-300mm-radius-blocks-each","provider":"David Astro","version":"1.0","type":"link"}