afocal

About 0.02 uses per million words.

Meaning

1. adjective Not focused
2. adjective Neither concave or convex (focal point at infinity)

Similar words

unfocalized unfocused nonfocal nonfoveal anastigmatic nonconfocal unfocusable nonoptical unfocussed unfocussable

Often followed by

system telescope systems lens attachment lenses attachments method telescopes