On guidescope rings, the only way to attach a guidescope or finderscope in a mounting ring, is the use of thumbscrews, that have plastic tips on the end of them. [Some thumbscrews may not have plastic tips on the end of them.] In order to complete the task of attaching a guidescope securely in the mounting ring, force must be applied from the tip or end of the thumbscrew to the tube body of the guidescope. The guidescope must be clamped and held firmly by these thumbscrews. But when doing this, problems can arise. The ends of the thumbscrews will exert force upon the tube assembly. Since a great amount of force is required to clamp and hold the guidescope, the small area at the end of the thumbscrew will act as a force multipler upon the tube assembly. This can do a few harmful things upon the tube assembly. It can pinch the optics, dent the tube assembly, warp the tube assembly, scratch the sides of the tube assembly. It doesn't take a genius to figure out that this is not good having a lot of force concentrated onto a tiny area on the tube assembly and that you really shouldn't have to have a lot of force to hold the tube assembly. So why not add a simple little piece of curved metal that has a rubber or felt padded surface that will evenly spread out that force from the ends of the thumscrews to a much larger area that is in contact with the tube assembly. |
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