The complete D5100 settings for live view and video recording. Live view is the display of an image preview on the monitor instead of in the viewfinder; the D5100 then behaves differently and movie recording is only possible in live view.
Switching live view on and off | Drag the live view next to the camera mode wheel back with your index finger to switch on an image preview on the camera monitor. A second time switches it off again.
The viewfinder image turns black as long as live-view is on. The mirror, which otherwise directs light upwards into the viewfinder, flips up to let it hit the image sensor.
Zooming in picture preview | The two buttons with the magnifying glass symbol let you zoom in and out of the image preview, just like in image playback.
Information displayed on the monitor | The info button switches between a couple of possible views with differing additional information:
When photographing in Live View mode, the autofocus works completely different than when photographing through the viewfinder. In practice, this means above all: slower .
The D5100 focuses based on the preview from the image sensor instead of using special autofocus sensors.
Starting autofocus | The D5100 starts focusing when you tap the shutter button, as when shooting through the viewfinder. And possibly when you press the AE-L/AF-L button if you have configured it to start autofocus.
Focus tracking | The focus tracking is to be selected in the shooting information, just as when shooting through the viewfinder. However, the options are different:
AF-F is for recording moview, so if you start a movie shot, the autofocus will continue even if the camera is panned. And before filming, the D5100 tries to be permanently ready to start recording with proper focus.
Focus point selection | In Live View mode the D5100 always focuses on where there is a coloured mark in the image.
The focus point control to set this mark is in the shooting information as when using the viewfinder, but offers a completely different selection:
Face-priority AF: The D5100 automatically detects faces facing the camera and focuses on them.
If it doesn't detect any, you can move the focus marker across the monitor with the direction buttons − even in diagonal − and immediately return it to the centre with the OK button.
The colour of the autofocus mark means:
Wide/normal area AF: Focuses on the rectangular mark.
The smaller focus area can be positioned more precisely, but gets caught more easily on places with low contrast where autofocus has problems.
The mark is red or green, with the same meaning as before.
Subject-tracking AF: The D5100 tracks a moving subject more or less reliably.
The colour of the autofocus mark means:
The OK button also ends the subject tracking, then the mark turns white again and you can restart.
The OK button immediately returns the autofocus marker from anywhere to the centre of the screen.
Also in live view mode you take a photo in live view mode with the shutter release button. It is normal that the shutter takes longer to release in live view mode.
You can adjust shooting settings such as white balance, exposure compensation, etc. in live view mode as when shooting through the viewfinder.
Start and stop movie recording | Movie recording is only possible in Live View mode.
The red button next to the shutter release button starts and stops the recording.
The movie recording starts independently of the autofocus, you must ensure correct focus before and during filming.
During recording, it can also be useful to press the AE-L/AF-L button to start the exposure lock and, for example, to keep the brightness unchanged during a camera pan.
Movie settings | Several settings for video recordings are bundled in the shooting menu :
The available frame rates depend on thein the setup menu.
Lastly, there is a menu that is relevant if you are filming abroad, where the frequency of the mains power is different from 50 Hz as in Europe: the setup menu
Electric light can flicker with the frequency of the mains power, which the human eye does not perceive, but it can cause flickering on movies. Telling the D5100 the correct mains frequency will help it to reduce flicker. The other frequency of 60 Hz is common in North America.