Casio Exilim EX-Z57 User Manual page 206

APPENDIX
Symptom
Images captured from a
movie on my computer
using commercially
available software appear
coarse and grainy.
Possible Cause
The size of movie images recorded by this camera
is 320 × 240 pixels. This is roughly equivalent to
snapshots recorded with a digital camera with a
resolution of 70,000 pixels.
To record high-resolution still images, record them
as snapshots.
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Action