plural of focuser

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

Having three times the focus. / Having three foci or goals.

(biochemistry) The electrophoresis of proteins through a pH gradient to locations corresponding to their isoelectric points

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.

Third-person singular simple present indicative form of self-focus

present participle of self-focus

simple past tense and past participle of self-focus

plural of focusing screen

(photography) A flat translucent material found in a system camera that allows the photographer to preview the framed image in a viewfinder.