Nikon D3400 Kit Owner's Manual

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140 Recording and Viewing Movies
A
Maximum Length
The maximum length for individual movie files is 4 GB (for maximum 
recording times, see page 141); note that depending on memory card 
write speed, shooting may end before this length is reached (
D
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 with 
subjects that are in motion, particularly if the camera is panned 
horizontally or an object moves horizontally at high speed through 
frame (for information on reducing flicker and banding, see Flicker 
reduction
0 213). Jagged edges, color fringing, moire, and bright 
spots may also appear. Bright regions or bands may appear in some 
areas of the frame with flashing signs and other intermittent light 
sources or if the subject is briefly illuminated by a strobe or other 
bright, momentary light source. 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.
The camera can record both video and sound; do not cover the 
microphone during recording. Note that the built-in microphone may 
record lens noise during autofocus and vibration reduction.
Flash lighting can not be used during movie recording.
Matrix metering is used regardless of the metering method selected. 
Shutter speed and ISO sensitivity are adjusted automatically unless On 
is selected for Manual movie settings (
0 142) and the camera is in 
mode M.