Capable of being focused; able to have focus adjusted or directed toward it.
From 'focus' + '-able' (suffix meaning 'capable of'). The '-able' suffix comes from Latin via Old French, creating adjectives that describe possibility or capability.
In photography, 'focusable' lenses compete with 'autofocus' technology—the choice between manual control and automatic convenience represents how technology changes what we consider desirable in our tools.
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