Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Tools and Equipment (hierarchy name)
5. equipment
6. [equipment by profession or discipline]
7. [equipment for science and technology]
8. optical instruments

Narrower term/s

• radio telescopes
• navigational telescopes

Anotations

Scope note:

Optical instruments for viewing distant objects by means of the refraction of light rays through a lens or the reflection of light rays by mirrors, so that the rays enter an opening and converge to form an image seen through a magnifying eye piece, or by other electronic means.