Canon MARK IV User Manual (en)

Live View Shooting Cautions
Notes About the Live View Image
Under low or bright light conditions, the Live View image might not reflect 
the brightness of the captured image.
If the light source within the image changes, the screen might flicker. If 
this happens, stop and resume the Live View shooting under the actual 
light source to be used.
If you point the camera in a different direction, it might throw off the Live 
View image’s correct brightness momentarily. Wait until the brightness 
level stabilizes before shooting.
If there is a very bright light source in the picture, such as the sun, the 
bright area might appear black on the LCD monitor. However, the actual 
captured image will correctly show the bright area.
In low light, if you set the [6 LCD brightness] to a bright setting, 
chrominance noise may appear in the Live View image. However, the 
chrominance noise will not be recorded in the captured image.
When you magnify the image, the image sharpness may look more 
pronounced than it really is.
About the <E> icon and camera’s internal temperature increase
When you shoot continuously with the Live View function for a long 
period or in high temperatures, the camera's internal temperature may 
increase and the <E> warning icon will appear on the screen. Note that 
if you shoot with the Live View function for a long period in high 
temperatures, the <E> warning icon will appear earlier. Turn off the 
camera when not shooting images.
If you shoot with the Live View function while the <E> warning icon is 
displayed, the image quality of still photos may be degraded. You should 
stop Live View shooting and allow the camera to rest until the camera’s 
internal temperature decreases.
If Live View shooting continues while the <E> warning icon is displayed, 
the camera’s internal temperature will further increase and Live View 
shooting may stop automatically. Live View shooting will be disabled until 
the camera’s internal temperature decreases. Turn off the camera and 
allow the camera to rest for a while.