Rolling shutter is a distortion that happens when a camera sensor reads the image line by line instead of all at once. Fast-moving subjects or quick camera movements can look slanted, wobbly or bent. You can reduce it by slowing your movements, choosing a different shutter mode, and using cameras with faster sensor readout.
Why It Happens
Many digital cameras use an electronic shutter or a sensor that scans from the top of the frame to the bottom. The top row records a slightly earlier moment than the bottom row. If something moves quickly during that tiny gap, the result is a shifted shape.
A global shutter captures every row at the same instant, so it avoids this effect. Cameras with a global shutter are less common, so most people manage rolling shutter through technique.
What It Looks Like
- Vertical lines lean when you pan quickly, such as a building that looks tilted.
- A propeller or fan blade may look curved or bent.
- Handheld video can show a jelly-like wobble.
- Artificial lights can create dark bands across the frame, because they flicker faster than the eye can see.
How to Reduce It
- Use the mechanical shutter for stills when the camera offers it, especially with moving subjects.
- Pan and tilt more slowly in video. Smooth, deliberate movements show less skew.
- Use stabilization, a gimbal or a tripod to remove shake that makes wobble more obvious.
- Choose a camera or mode with faster readout, such as a cropped or lower-resolution mode if the maker says it reads out faster.
- Match shutter speed to local mains frequency when filming under artificial lights. Roughly 1/50 or 1/100 in regions with 50 Hz power, and roughly 1/60 or 1/120 in regions with 60 Hz power, are common general first settings.
- Avoid shooting fast-moving objects up close, such as a passing vehicle, when the electronic shutter is the only option.
Can You Fix It Afterward?
Some editing software offers a rolling shutter correction tool for video. It works best on mild distortion and cannot always remove strong skew. Prevention at the time of shooting is more reliable.
When It Does Not Matter
For static scenes, landscapes, portraits and slow movement, rolling shutter is rarely visible. It matters most for sports, action video, drone footage and quick pans.
FAQ
Does a faster shutter speed remove rolling shutter?
Not exactly. Shutter speed controls exposure time for each row, but the delay between rows is set by sensor readout. A fast shutter speed freezes motion within a row yet does not remove the row-to-row delay.
Do all cameras suffer from it?
Most cameras with electronic shutters show some amount. The effect is stronger on slower sensors and weaker on faster ones, so check the maker’s notes on readout speed.
The Short Version
Rolling shutter comes from line-by-line sensor readout and shows up as skew, wobble and banding. Use a mechanical shutter when possible, move the camera gently, stabilize your shots and match shutter speed to artificial lights.
