The film or other detector is placed inside the camera, at the prime focus.
So water is a prime focus of the delegates in Johannesburg.
This prime focus of attention had not even the grace to blush.
True, the prime focus of Conservative government must be a return to economic health.
It was their prime focus, a task they had applied themselves to all this time.
Local manufacturers are the prime focus of the museum exhibits.
He saw the development of the young lay movement as the prime focus of his mission.
The student's discovery of individual strengths and directions is a prime focus.
Also important are coming global trade negotiations, where agriculture will be a prime focus.
Sienko said his prime focus would be to acquire a center.