James Cameron went full OCD on this production, at every point. He even tracked down the company who made the rugs on the original ship(!!). He got Panavision to make cameras that could withstand the pressure to film the real Titanic at the bottom of the ocean(actually, they offered to, but still). And, if you don't have the letterboxed version, he reframed almost every shot for home video(won't bore you to death with how/why).