'Focus' tops box office with $19.1M opening.

Byline: JAKE COYLE

NEW YORK -- Will Smith's con-man caper ''Focus'' disrobed ''Fifty Shades of Grey'' at the box office, but the film's modest $19.1 million opening still left questions about the drawing power of the once unstoppable star.

According to studio estimates Sunday, Warner Bros.' ''Focus'' easily topped all competitors on a weekend with little competition at North American multiplexes. In second place was the Colin Firth spy thriller ''Kingsman: The Secret Service,'' which made $11.8 million in its third week of release.

After two weeks atop the box office, ''Fifty Shades of Grey'' continued its steep slide, landing in fourth with an estimated $10.9 million for Universal Pictures. ''Fifty Shades,'' which has made $486.2 million globally, fell just behind Paramount's ''The SpongeBob Movie: Sponge Out of Water,'' which earned $11.2 million in its fourth week.

The weekend's only other new wide release, Relativity's horror film ''The Lazarus Effect,'' opened in fifth place with $10.6 million.

But the weekend was largely seen, fairly or not, as a referendum on Smith's star power. ''Focus,'' written and directed by the ''Crazy, Stupid, Love'' duo Glenn Ficarra and John Requa, is Smith's first...