drawtubes
/ˈdrɔːˌtuːbz/
noun
- Tubes that can be pulled out or extended, especially on a telescope or microscope to adjust focus or length.
- The microscope's drawtubes were extended to the proper length for focusing.
- She carefully cleaned the drawtubes of the antique brass telescope.
- He adjusted the drawtubes on the telescope to get a clearer view of the moon.