Panasonic Lumix DMC-GF3 Basic Owner's Manual page 250

Recording motion pictures is not possible.
•
You may not be able to record for a short while after turning the power [ON] when using a large
capacity card.
Motion picture recording stops in the middle.
•
Use a card with SD Speed Class with "Class 4" or higher when recording motion pictures in
[AVCHD].
Also, use a card with SD Speed Class with "Class 6" or higher when recording motion pictures
in [MOTION JPEG].
•
Depending on the type of the card, recording may stop in the middle.
> If motion picture recording stops during use of a card of at least "Class 4" or if you use a
card on which recording and deleting have been repeated many times, or a card that has
been formatted on a PC or other equipment, the data-writing speed is lower. In such cases,
we recommend that you make a backup of the data and then format
unit.
When recording a motion picture, the screen may go dark.
•
When recording a motion picture, the screen may go dark after a certain period to reduce
battery consumption, but this will not affect the recorded motion picture.
The screen may be blacked out momentarily, or the unit may record noise.
•
The screen may be blacked out momentarily, or the unit may record noise due to static
electricity or electromagnetic waves etc. depending on the environment of the motion picture
recording.
Object seems to be warped.
•
Object seems to be warped slightly when the object moves across the image very fast, but this
is because the unit is using MOS for the image sensor. This is not a malfunction.
In motion pictures, abnormal clicking and buzzing sounds are recorded.
The recorded sound is very quiet.
•
With recording in a quiet environment, depending on the lenses used, the sound of aperture
and focus actions may be recorded in motion pictures. This is not a malfunction. Focus
operation while recording motion pictures can be set to [OFF] with [CONTINUOUS AF] (P44).
•
Be careful while recording motion pictures because the sounds of the zoom operations, buttons
and dial operation etc. may be recorded.
•
While recording motion pictures, plugging the aperture of the microphone with a finger may
reduce the level of audio recording or audio may not record at all. Also be careful because the
operation sound of lenses can easily be recorded at this time.
Others
Motion pictures
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(P68) the card in this