Prime focus photography — where you use your telescope as your camera's "lens" — is a popular hobby in and of itself. If you have a Canon EOS camera body, the Celestron Canon EOS T-ring is one of the first accessories you will need if you want to take pictures through a telescope. You can take short exposure images of terrestrial scenes or bright celestial objects like the Moon by using a simple T-adapter (sold separately) to turn your telescope or spotting scope into a large telephoto lens. With additional guiding equipment, you can even capture long exposures of deep sky objects like nebulae and star clusters.
Note: This T-ring fits EOS model cameras only. It will not work with other Canon camera bodies.