Part of the Patrick Moore's Practical Astronomy Series book series (PATRICKMOORE)
Some sort of tube structure is required to keep the telescope optical components appropriately lined up and pointing at anything. The tube structure can be either opaque or open.
KeywordsStray Light Tube Structure Light Pollution Lens Cell Block Plane
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
© Springer Science+Business Media, LLC 2011