Crayford focuser

短语

词形变化

Crayford focusers 复数 Crayford focusers

释义与例句

n.
  1. 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.

词源

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

来源：wiktionary