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.

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Will Smith and Margot Robbie are all smiles at the Feb. 24 Hollywood premiere for “Focus.”

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 film since 2013’s “After Earth,” the sci-fi flop in which he co-starred with his son, Jaden.

Smith has been frank about the sting of that film’s box-office performance. “I can’t allow the box-office success, or lack thereof, to determine my self-image,” he said in a recent interview with The Associated Press.

But “Focus,” made for about $50 million and co-starring Margot Robbie of “The Wolf of Wall Street,” was never intended to be a summer-sized blockbuster. It had been predicted to make around $21 million.

“This is a mid-budgeted film with a result that matches,” said Jeff Goldstein, head of distribution for Warner Bros., who added that winter storms accounted for a drop of $1 million to $2 million. “There’s no question we got hammered because of inclement weather in the South and the Midwest.”