Adjusting Exposure - HP Jornada 520 User Manual

Adjusting Exposure

The HP pocket camera software uses two settings (gain and
shutter speed) to ensure the pictures you snap are not too dark
or too light. If you snap a picture in dark conditions, a slower
shutter speed allows the camera to capture more light. If you
snap the same picture at a faster shutter speed, the camera
compensates by using gain to amplify the existing light.
Because increasing the gain can make your pictures look fuzzy
or "washed out," the software adjusts the shutter speed first,
and then increases the gain value.
The Slow, Action, and Night exposure modes specify the mini-
mum shutter speed. For example, if you take a picture outdoors
on a cloudy day with the exposure mode set to Night, the soft-
ware may slow the shutter speed to 1/20 second, while keeping
the gain set at 1 (the optimum value). If you take the same
picture with the exposure mode set to Action, the shutter speed
must remain at 1/125 second, and the software may increase
the gain to +10 or more to compensate for the limited light.
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