What Shutter Speed Should You Use for Video? The 180-Degree Rule Explained
For most video, set your shutter speed to double your frame rate. Here’s how the 180-degree rule works, a chart for common frame rates, and when to break it.
For most video, set your shutter speed to double your frame rate. At 24fps that means 1/48 of a second, or 1/50 on cameras that don’t offer 1/48.
That guideline is called the 180-degree rule. It’s the reason most film and TV footage has the motion blur audiences expect. Here’s how it works, a quick chart for common frame rates, and when it makes sense to break it.
What Is the 180-Degree Rule?
The rule comes from film cameras, which used a spinning half-circle shutter called a rotary shutter. A 180-degree opening exposed each frame for half the time between frames.
At 24fps, each frame lasts 1/24 of a second. Half of that is 1/48, which became the standard exposure time for film.
The motion blur from that exposure is what makes movement look natural on screen. It’s smooth enough to avoid stutter, and short enough to keep detail.
Shutter Angle vs. Shutter Speed
Shutter speed and shutter angle describe the same thing in different ways. Shutter speed is an exact exposure time, like 1/50. Shutter angle is the fraction of each frame’s duration that the shutter stays open, written in degrees.
The formula is shutter speed = angle ÷ (360 × frame rate). At 24fps, 180 degrees equals 1/48, 90 degrees equals 1/96, and 360 degrees equals 1/24.
Cinema cameras from ARRI, RED, Blackmagic Design, Canon’s Cinema EOS line, and Sony’s Cinema Line let you set shutter angle directly. The practical advantage is that the angle stays the same when you change frame rates, so your motion blur stays consistent automatically.
Shutter Speed Chart for Common Frame Rates
| Frame Rate | 180° Shutter Speed | Closest Common Setting |
|---|---|---|
| 23.976 / 24fps | 1/48 | 1/50 |
| 25fps | 1/50 | 1/50 |
| 29.97 / 30fps | 1/60 | 1/60 |
| 50fps | 1/100 | 1/100 |
| 59.94 / 60fps | 1/120 | 1/125 |
| 120fps | 1/240 | 1/250 |
If you’re shooting slow motion, set the shutter based on your capture frame rate, not your timeline. Footage shot at 120fps for a 24fps timeline should use about 1/240.
For more on the 23.976 vs. 24 question, see 23.976 vs. 24fps: Which Frame Rate Should You Use?.
When to Break the 180-Degree Rule
A narrower shutter (faster speed) reduces motion blur and gives action a sharp, staccato feel. Saving Private Ryan’s Omaha Beach sequence is the classic example, with narrow shutter angles that make debris and movement look jarring.
Narrow shutters also help when you need clean individual frames for sports, VFX tracking, or pulling stills from video.
A wider shutter (slower speed) adds more blur for a dreamy or disoriented look. It also lets in more light, which helps in very dark scenes when you can’t raise ISO any further.
Flickering lights are the most practical reason to adjust. In regions with 60Hz power, like the U.S., some LEDs and fluorescents flicker at 1/48 or 1/50. Switching to 1/60 (144 degrees at 24fps) usually fixes it. In 50Hz regions, 1/50 (172.8 degrees at 24fps) does the same.
Screens in the shot can also show rolling bands. Fine-tune the shutter until they disappear, and many cameras offer precise angle or speed steps for exactly this.
Why the 180-Degree Rule Makes ND Filters Essential
Locking your shutter at 1/50 removes one of your three exposure controls. In bright daylight, that leaves aperture and ISO to manage exposure.
If you want a shallow depth of field, ND filters are the only way to cut enough light while keeping both the shutter and the aperture where you want them. That’s why ND filters are standard kit for video shooters.
For the math, see How Many Stops of ND Do You Need for Video?. If you shoot a camera without internal ND, the Sony FX5 ND Filter Guide covers options for every budget and rig.
Competitive Context
How you set shutter depends on your camera. Cinema cameras default to shutter angle, while most hybrid mirrorless cameras default to shutter speed, though many now offer angle as a menu option.
Phones typically choose shutter speed automatically. Apps like Blackmagic Camera allow manual shutter angle control. That’s one reason phone footage often looks too crisp in bright light without an ND filter on the lens.
The Signal in the Noise
Start at double your frame rate and change it only when you have a specific reason. Most footage that looks “off” to viewers comes from a shutter speed that’s too fast in daylight, usually because no ND filter was used.
If your camera offers shutter angle, use it. It keeps motion blur consistent across frame rate changes and makes the creative choices easier to think about.
The Details
- 180-degree rule: Shutter speed = 1 ÷ (2 × frame rate)
- Angle formula: Shutter speed = angle ÷ (360 × frame rate)
- 24fps: 1/48 (or 1/50)
- 30fps: 1/60
- 60fps: 1/120 (or 1/125)
- 60Hz flicker fix at 24fps: 1/60 (144°)
- 50Hz flicker fix at 24fps: 1/50 (172.8°)
Do you stick to the 180-degree rule, or do you change your shutter for specific looks? Share the settings you use most in the comments.
