This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Dobsonian tube sections. en depiction of the sections of dobsonian telescope tube fitting together There is supporting board underneath which can be removed once the clamps are secure This enables one person to put the telescope together without help The concept isn't novel it dates back at least to the babylonians but it is extremely