What is the purpose of the Orion Optics UK 300mm Radius Blocks?
Their 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.
How many 300mm Radius Blocks do I need to mount my Orion Optics UK telescope?
These 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 two radius blocks—one for each mounting point.
Are the Orion Optics UK 300mm Radius Blocks compatible with other telescope brands?
These 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.
Do the Orion Optics UK 300mm Radius Blocks include mounting hardware?
No, 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.
How do I use the 300mm Radius Blocks to attach a Losmandy-style dovetail plate to my Orion Optics UK Newtonian?
You 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.
Will these radius blocks help stabilize a heavy imaging setup on my 300mm Orion Optics UK scope?
Yes. 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.