Shutter speed is often neglected in video production. Many videographers leave it to auto mode — and then wonder why some shots look too sharp, too jerky, or just somehow wrong.

What the shutter does

The camera shutter determines how long the sensor is exposed during each shot. At 1/50 second, it remains open for one fiftieth of a second. A short exposure time means less light and sharper motion. A long exposure time means more light, but motion blur.

The 180-Degree Rule — and why it works

In classic film production, a physical shutter disc rotates in front of the film. This disc has a cutout — known as the shutter angle. At 180 degrees, half of the disc is open: meaning the film is exposed for exactly half the time it takes for one rotation.

At 25 fps, the disc makes 25 rotations per second. This results in an exposure time of 1/50 second per frame. That is the 180-degree rule: double the frame rate equals the shutter speed. 25 fps → 1/50. 50 fps → 1/100. 24 fps → 1/48 (often rounded to 1/50).

This value creates the motion blur that the eye perceives as natural and cinematic. If you go above it (1/25 at 25 fps), the video appears jittery. If you go below it (1/200 at 25 fps), every movement looks too sharp — almost jerky, like what you see in video games. Not wrong — but it requires intention.

When to break the rule

Sports, action, slow motion — these are areas where high shutter speeds are used deliberately. The sharpness of the motion is then not a mistake, but part of the look. Creative light trails with long exposures can create a beautiful effect. But both only work if you know what you are doing.

Best regards,
Sascha Manke