The image may be slightly tilted, out of focus, or obstructed by people moving in the theater.
The sound is usually captured by the camera’s built-in microphone, resulting in muffled dialogue and Echoes from the theater room. Understanding the Resolution Labels
The film’s sound design and Michael Giacchino’s score are highly praised. An "HDCam" audio track will lose the booming bass of the Batmobile and the subtle atmospheric sounds of Gotham's rain. Better Ways to Watch
Much of the movie takes place in low-light environments. Official versions (like those on HBO Max) use High Dynamic Range (HDR) to ensure you can actually see what’s happening in the shadows.
An (or "CAM") is a bootleg recording made by someone bringing a camera into a movie theater. Even if the camera itself is high-definition (HD), you are watching a recording of a projection, which leads to several issues:
You can rent or buy it in true HD on Amazon Prime Video, Apple TV, or Google Play.
Because The Batman is a very dark film with heavy use of shadows, these recordings often look "muddy" or grey rather than deep black.