How to Modify the Auto Power Off Time on Your Canon EOS 6D
Your Canon powers off automatically after one minute of non-operation. You can specify a period of time from 1 minute to 30 minutes for auto power off, or you can disable the feature. However, your camera will automatically power off after 30 minutes of non-activity even if you choose to disable this feature.
If you choose a power-off time that's a short duration, you’ll conserve your battery. After your camera powers off, press the shutter button and the camera powers on again. To change the power-off time:
Press the Menu button.
The previously used menu appears on the LCD monitor.
Press the Multi-controller button to navigate to the Camera Settings 2 tab.
Use the Quick Control dial to highlight Auto Power Off and then press the Set button.
The Auto Power Off options display.
Use the Quick Control dial to highlight the desired setting and then press Set.
The change is applied.
Choose the shortest duration for auto-power that you’re comfortable with. This helps conserve battery power. As long as the power button is in the On position, your camera wakes almost instantaneously when you press the shutter button halfway.
To restore the camera to its default settings, press the Menu button, and then use the Multi-controller to navigate to the Camera Settings 3 tab, choose Clear All Camera Settings, and press Set.