Canon 650D - Manual (Page 326)

Troubleshooting Guide
326
If the card’s writing speed is slow, movie shooting may stop
automatically. Use an SD Speed Class 6 “
” or faster card. To
find out the card’s read/write speed, see the card manufacturer’s Web
site, etc.
If the movie shooting time reaches 29 min. 59 sec., the movie shooting
will stop automatically.
In shooting modes other than <a>, the ISO speed is set
automatically. In the <a> mode, you can freely set the ISO speed
(p.174).
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. Changes in the exposure may be recorded as a result (except
EF-S18-135mm f/3.5-5.6 IS STM).
If you move the camera to the left or right quickly (high-speed panning)
or shoot a moving subject, the image may look distorted.
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 also be recorded. In the <a> mode, a slow shutter speed
may solve the problem.
Movie shooting stops by itself.
The ISO speed cannot be set for movie shooting.
The exposure changes during movie shooting.
The subject looks distorted during movie shooting.
The image flickers or horizontal stripes appear during movie
shooting.
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