Nikon D5100 Reference Manual page 42

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End recording.
Press the movie-record button again to end recording. Recording will end
automatically when the maximum length is reached, the memory card is full,
another mode is selected, the lens is removed, or the monitor is closed (closing
the monitor does not end recording on televisions or other external displays).
[] Taking Photographs During Movie Recording
To end movie recording, take a photograph, and exit to live view, press the shutter-release
button all the way down and hold it in this position until the shutter is released.
[] Maximum Length
Each movie file can be up to 4 GB in size and 20 minutes long; note that depending on
memory card write speed, shooting may end before this length is reached (_ 207). Movies
recorded in miniature effect mode are up to three minutes long when played back.
_1_ Recording Movies
Flicker, banding, or distortion may be visible in the monitor and in the final movie under
fluorescent, mercury vapor, or sodium lamps or if the camera is panned horizontally or an
object moves at high speed through frame (flicker and banding can be reduced by choosing
a Flicker reduction option that matches the frequency of the local AC power supply;
170). Bright light sources may leave after-images when the camera is panned. Jagged
edges, color fringing, moire, and bright spots may also appear. When recording movies,
avoid pointing the camera at the sun or other strong light sources. Failure to observe this
precaution could result in damage to the camera's internal circuitry.
Live view may end automatically to prevent damage to the camera's internal circuits; exit live
view when the camera is not in use. Note that the temperature of the camera's internal
circuits may rise and noise (bright spots, randomly-spaced bright pixels, or fog) may be
displayed in the following instances (the camera may also become noticeably warm, but this
does not indicate a malfunction):
• The ambient temperature is high
• The camera has been used for extended periods in live view or to record movies
• The camera has been used in continuous release mode for extended periods
If a warning is displayed when you attempt to start live view or movie recording, wait for the
internal circuits to cool and then try again.
Matrix metering is used regardless of the metering method selected. Shutter speed and ISO
sensitivity are adjusted automatically. The settings available during recording are as follows:
Aperture ShutterspeedISOsensitivityExposure compensation
[] See Also
For information on choosing focus and AF-area modes, see page 100. See page 106 for
information on focusing in live view.
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