Fifty years after “Jaws” sunk its teeth into us, we’re still admiring the bite mark. Steven Spielberg’s 1975 film, his second feature, left such a imprint on culture and Hollywood that barely any trip to the movies,

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.