The 180-degree shutter rule for natural motion

In video, shutter speed controls how much motion blur appears in each frame. Too little blur looks choppy; too much looks smeared.

The rule

Set shutter speed to about double the frame rate:

• 24 fps → 1/50
• 30 fps → 1/60
• 60 fps → 1/125
• 120 fps → 1/250

Why it works

This mimics film cameras with a 180-degree rotary shutter, producing motion that looks natural to our eyes.

Controlling exposure in daylight

Because shutter speed is fixed, you cannot raise it to darken a bright scene. Use a variable ND filter to reduce light instead of closing the aperture.

Breaking the rule

• Fast shutter, such as 1/1000, creates a staccato, sharp look used in action and war scenes.
• Slow shutter adds dreamy blur for creative transitions or low light.

Flicker

Under artificial light in Mexico (60 Hz), use 1/60 or 1/120 to avoid flicker from LED and fluorescent lights.