Nokia NHL-2NA Series Troubleshooting Instructions page 134

NHL-2NA
CCS Technical Documentation
Figure 4: Geometrical distortion
Amount of light available: in dim conditions camera runs out of sensitivity. Exposure
time is long (especially in night mode) and the risk of getting shaken (= blurred) images
grows. Image noise level grows. The maximum exposure time in night mode is ¼ sec-
onds, so images need to be taken with extreme care and by supporting the phone when
the amount of light reflected from the target is low. Sometimes blurring may even hap-
pen at daytime if image is taken very carelessly. See Handshake has caused blurring of
this image. Note geometrical barrel distortion in background for example. This is normal
behavior, do not change the camera module.
Figure 5: Handshake has caused blurring of this image. Note geometrical barrel distortion in background
Movement in bright light: If pictures of moving objects are taken or if the device is used
in a moving car, object 'skewing' or 'tilting' will occur. This phenomena is fundamental to
most CMOS camera types and normal, and can not be helped. Movement of camera or
object will usually cause blurring in inside or dim lighting conditions due to long expo-
sure time. This is normal behavior, do not change the camera module.
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