theorists include Sergei Einstein and Rudolph Arnheim.
Invisible style A norm of filmmaking in which style is not usually noticed, based on the assumption that narrative is always more important than style and should dominate it. Such devices are not crossing the 180 degree line and cutting on action, reaction, and dialogue contribute to this invisible style.
The 180 degree line An imaginary line drawn between the camera and the actors/action which the camera does not cross in order to prevent viewer disorientation and maintain an invisible style.
Realism A film theory which emphasizes the recording nature of cinema, as well as the connection between the camera and what is in front of it in real life. Major realists include Andre` Bazin and Siegfried Krucauer.
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