Steven Spielberg’s 1975 film, his second feature, left such a imprint on culture and Hollywood that barely any trip to the movies, let alone to the beach, has been the same since. Few films have been more perfectly suited to their time and place than “Jaws,

Completed despite production problems, equipment malfunctions and budget adjustments, the movie proved an enduring, thrilling work of popular filmmaking that virtually invented the summer blockbuster as we know it.

The movie that made Steven Spielberg a household name and redefined box-office success is turning 50 this year.