Canon EOS Rebel SL1 18-55mm IS STM Kit Instruction Manual page 338

Troubleshooting Guide
The exposure changes during movie shooting.
If you change the shutter speed or aperture during movie shooting, the
changes in the exposure may be recorded.
Zooming the lens during movie shooting can cause changes in the
exposure regardless of whether the lens' maximum aperture changes
or not. The changes in the exposure may be recorded as a result.
The subject looks distorted during movie shooting.
If you move the camera to the left or right quickly (high-speed panning)
or shoot a moving subject, the image may look distorted.
The image flickers or horizontal stripes appear during
movie shooting.
Flickering, horizontal stripes (noise), or irregular exposures can be
caused by fluorescent light, LED bulbs, or other light sources during
movie shooting. Also, changes in the exposure (brightness) or color
tone may be recorded. In the <a> mode, a slow shutter speed may
solve the problem.
Operation Problems
During touch screen operations, the beeper suddenly
sounds softer.
Check if your finger is blocking the speaker (p.22).
Touch screen operation is not possible.
Check if [53: Touch control] is set to [Standard] or [Sensitive]
(p.55).
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