Answer: zeroin

AnswerCrossword Clue
ZEROINConverge
ZEROINFocus
ZEROINFocus on, with "on"
ZEROINFocus (on)
ZEROINAim at the precise center
ZEROINConverge (on)
ZEROINPosition the cross hairs (on)
ZEROINTake close aim
ZEROINGet closer
ZEROINFocus on (with "on")
ZEROINFocus on
ZEROINGet closer and closer