If you want to install a giode telescope in parallel to the main one, guide rings offer the simplest and cheapest solution to make this. The Guide rings PLUS 115mm offer a high build quality and all the features useful for this application, allowing you to install guide telescopes such as diameter 80mm refractors.
Fits Losmandy style saddles. Includes two 100mm adjustable guidescope rings with large delrin tipped thumb screws. Adjustable from 70mm – 90mm.