To many photographers, a federal appeals court ruling last spring that permitted Richard Prince to use someone else’s photographs in his art was akin to slapping a “Steal This” label on their work.

The United States Court of Appeals for the Second Circuit reasoned that as long as Mr. Prince’s work transformed the images into original art, he was not violating anyone’s copyright.

But photographers are pushing back against that interpretation. Several membership and trade organizations have banded together recently to press their cause in Congress and the courts.

More than half a dozen groups, including the National Press Photographers Association, Professional Photographers of America and the Picture Archive Council of America, have joined together to submit a friend of the court brief to support the photographer Patrick Cariou, after part of his case against Mr. Prince was sent back to a judge for reconsideration. That informal coalition is considering hiring a Washington lobbyist, said Victor Perlman, general counsel for the American Society of Media Photographers, and, last month, several of the groups sent representatives to meet with legislators, including members of a House of Representatives subcommittee.