Camera shutter angle setting that exposes each frame for half the frame duration (24fps = 1/48s), producing natural motion blur without strobing effects.
Technical Characteristics
The 180-degree shutter creates an exposure time that corresponds to half the frame rate. At 24fps, the shutter speed is 1/48s, at 25fps it's 1/50s. This setting produces natural motion blur without jerky or overly sharp movements. Deviations require adjustments to aperture and ND filters for exposure control.
Applications
Standard for narrative films and normal scenes. Shorter shutter speeds (90-degree) create hard, precise movements for action scenes. Longer shutter speeds (270-degree or more) create soft, dreamlike motion blur. The 180-degree rule saves testing time on set and prevents editing problems in post-production. Creative deviations require additional ND filters and shooting time.