1.   At Metro Networks, camera operators have done favors for the police several times by training their lenses on areas of frequent criminal activity.

2.   Author Peter F. Stevens takes us back to that historic moment when Morse trained the lens of his huge, cumbersome camera on his fellow Yale alumni.

3.   Even when Meisel trains his lens on someone like Ms. Elson, the model can still remain merely an insider favorite.

4.   Generations of photographers since have trained their lenses on graduates, from grade school to university.

5.   Pennebaker and Ms. Hegedus, who are married and live in Manhattan, had long wanted to train their lenses again on Broadway.

6.   Then, with his final flash, he trained his lens on the mezzanine, where bodies were bouncing on the awning and striking the marquee.

7.   These computer printouts yielded data at four-minute intervals for an observatory less than a mile from the Montparnasse neighborhood where Cocteau had trained his lens.

8.   Tourists shooting pictures of the Empire State Building swung around and trained their lenses on the disorder in the street.

9.   What would celebrities more used to being photographed than using cameras themselves train their lenses on if they had a chance?