Technology
Time-lapse playback duration
Turn a capture duration, interval and frame rate into time-lapse playback length.
Calculators / Technology / Shutter angle and exposure time
Shutter angle and exposure time calculator
Convert a cinema shutter angle to exposure duration at a chosen frame rate.
On this page
Exposure duration0.02s
Reciprocal exposure denominator48
Exposure per frame50%
Calculator controls
How to calculate
Convert a cinema shutter angle to exposure duration at a chosen frame rate.
Exposure duration =
angle/(360*fps) sReciprocal exposure denominator =
360*fps/angleExposure per frame =
angle/360*100 %Worked example
- Capture frame rate (fps): 24
- Shutter angle (degrees): 180
- Exposure duration: 0.02 s
- Reciprocal exposure denominator: 48
- Exposure per frame: 50 %
Assumptions and limits
A mathematical equivalent for constant frame rate. Camera readout, lighting flicker, available shutter settings and motion blur requirements are separate considerations.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Convert a cinema shutter angle to exposure duration at a chosen frame rate. A 180-degree angle exposes for half a frame period. At 24 fps, exposure is 1/48 second.
When this tool is useful
A 180-degree angle exposes for half a frame period. At 24 fps, exposure is 1/48 second.
Understanding your inputs
| Input | Example |
|---|---|
Capture frame rate (fps) fps | 24 |
Shutter angle (degrees) angle | 180 |
Frequently asked questions
What does this estimate leave out?
A mathematical equivalent for constant frame rate. Camera readout, lighting flicker, available shutter settings and motion blur requirements are separate considerations.
How do I check the example?
Use the stated units and the formula below. Keep full precision until the final answer; change one input at a time to see its effect.