Crayford focuser

noun

A simplified focusing mechanism for amateur telescopes, having a smooth spring-loaded shaft which holds the focus tube against four opposing bearing surfaces, and controls its movement.

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Meanings

nounCrayford focuser (plural Crayford focusers)

plural Crayford focusers

  1. A simplified focusing mechanism for amateur telescopes, having a smooth spring-loaded shaft which holds the focus tube against four opposing bearing surfaces, and controls its movement.

Origin

It was initially demonstrated to the Crayford Manor House Astronomical Society.

Full word history & related roots →
Cite this entry
APA

Crayford focuser. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Crayford%20focuser

MLA

“Crayford focuser.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Crayford%20focuser. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “Crayford focuser,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Crayford%20focuser.

Source: Crayford focuser on Wiktionary, CC BY-SA 4.0.