How the Formula Works

This calculator determines the ideal shutter speed for drone video to avoid rolling-shutter jello and achieve natural motion blur.

The 180° Rule

Shutter Speed (seconds) = (Shutter Angle / 360) × (1 / Frame Rate)

For the standard 180° rule:

Shutter Speed = 1 / (Frame Rate × 2)

Example

  • Frame Rate: 30 fps
  • Shutter Angle: 180°
Shutter Speed = (180/360) × (1/30) = 1/60 second

Frame Interval

Frame Interval (ms) = 1000 / Frame Rate

This is the time between each frame capture.

FAQs

1. What is the 180° shutter rule?
The 180° rule states that shutter speed should be double the frame rate (e.g., 1/60s at 30fps). This produces natural motion blur that looks cinematic.

2. What is rolling-shutter jello?
Jello effect is a wobbly distortion in video caused by the camera’s rolling shutter reading the sensor line-by-line while the drone vibrates. Using the correct shutter speed helps minimize it.

3. What happens if my shutter speed is too fast?
Video looks stuttery and unnatural with no motion blur. This is common when shooting in bright daylight without ND filters.

4. What happens if my shutter speed is too slow?
Video has excessive motion blur and looks smeared, especially during fast drone movements.

5. How do I achieve the correct shutter speed in bright conditions?
Use ND (neutral density) filters to reduce light entering the lens, allowing you to keep the shutter open longer at the correct speed.

6. What shutter angle should I use for different looks?

  • 180°: Standard cinematic look
  • 360°: Double motion blur (dreamy, smooth)
  • 90°: Sharper, more staccato look

7. Does this apply to 4K/60fps video?
Yes. The rule scales with frame rate. At 60fps, use 1/120s shutter for 180°.

Reference Links