focuser

聚焦放大镜, 聚焦装置

词形变化

focusers 复数 focusers

别名

focusser

释义与例句

n.
  1. 1.

    A device which allows one to adjust the focus of an instrument such as a telescope.

    I decided to upgrade my telescope with a feather-touch focuser.

相关短语

Crayford focuser

词源

From focus + -er.

来源：wiktionary