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Photo camera shutter vs film camera shutter (rotary shutter)
The motion blur settings in Maxwell can be set both for a photo camera and a film camera, so it's important to know how the shutter works in each case to understand the settings.
In a photo camera the shutter simply opens and closes like a curtain to expose the film to light. This speed is determined by the shutter speed parameter in the Maxwell camera. It is denoted as fractions of a second - 1/20 for one 20th of a second, 1/40, 1/250 etc.
Setting the camera this way means your shutter will be open for a given period of time, no matter the fps setting of your animation time line.
The shutter on a film camera however is a rotating disc with an opening cut into it, called a rotary shutter, and the angle of this opening determines how long the film is exposed to light as the film rolls by the shutter. Setting the camera this way means the motion blur effect still depends on the fps of your animation because a frame of film can't be exposed longer than the fps setting of the animation, even if the rotary shutter is open during the whole frame. This means an animation running at 60fps will have less of a motion blur effect than one running at the typical film fps of 24.
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