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