A universal camera adapter allows any camera to be attached to a telescope or binoculars. This adapter was built in 2008 and still in use today.
This imaging method is called afocal imaging, in which a camera with its lens is mounted next to another image-forming optical system such as a telescope with an eyepiece or a pair of binoculars.
Related link: Smartphone-to-Telescope Adapter
Night Sky in Focus Astronomy and Amateur Radio © Anthony Urbano (Manila, Philippines)