Canon EOS 70D Operation Manual - Page 250

Live View Shooting Cautions Live View Image Under low- or bright-light conditions, the Live View image may not reflect the brightness of the captured image. Even if a low ISO speed is set, noise may be noticeable in the displayed Live View image under low light. However, when you shoot, the image recorded will have minimal noise. (The image quality of the Live View image is different from that of the recorded image.) If the light source (illumination) within the image changes, the screen may flicker. If this happens, exit Live View shooting and resume shooting under the actual light source. If you point the camera in a different direction, it may 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, the bright area may appear black on the LCD monitor. However, the actual captured image will correctly show the bright area. In low light, if you set the [52: LCD brightness] to a bright setting, noise or irregular colors may appear in the Live View image. However, the noise or irregular colors will not be recorded in the captured image. When you magnify the image, the image sharpness may look more pronounced than in the actual image. Custom Functions During Live View shooting, some Custom Function settings will not take effect (p.363). Lens and Flash The focus preset function is possible for Live View shooting only when using a (super) telephoto lens equipped with the focus preset mode, available since the second half of 2011. FE lock will not work if the built-in flash is used. FE lock and modeling flash will not work if an external Speedlite is used. 250