Guide scope rings or guide rings are mechanisms used for mounting guide scopes. A guide scope is a telescope used to monitor tracking accuracy while a main telescope takes a long-exposure photo. Errors in tracking are detected with a guide scope by monitoring a guide star. Corrections are made by the mount to keep the guide star centered, and thus, keeping the main imaging telescope pointed at a target for the whole duration of an exposure.
This DIY guide scope rings set is used with a 60 mm f/5 guide scope and a 114 mm f/8 imaging telescope.
Related link: View all home-brewed DIY astronomy equipment
Night Sky in Focus © Anthony Urbano | Bacoor, Philippines
Night Sky in Focus 
There is no link or button to describe how to make the DIY Scope rings. HELP Bruce LathropUSA
Hi Bruce, just fabricate two circular rings, put some adjustment screws, then clamp the rings on to a plate. Good luck!