Fantasea FP-4 Operator's manual - Battery Life:
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Battery life:
The Lithium-ion battery that comes with the Coolpix is very
efficient and lasts for more than enough time for a typical photo
dive. However, there are certain things that users can control to
help with battery life. The most important is to set the camera to
turn the LCD off after a short time, during periods of non-use.
It can then be automatically turned back on if you depress the
shutter release control half way. Please refer to the Coolpix
instruction manual for details on how to make this adjustment
setting. It is always wise to have backup batteries in case you do
run out of power. The supplied battery can be recharged many
times and offer an economical and environmentally friendly
power source.
Using The Flash:
The Coolpix has a built-in flash, which will illuminate nearby
underwater subjects. For subjects that are farther away, an accessory
slave flash is recommended. (See Below.) A built-in flash diffuser
is supplied which will help achieve a wider and softer light source
thereby providing more coverage and less likelihood of backscatter
(the unattractive snowstorm affect of the flash reflecting off the
suspended particles in the water). Further reduction of backscatter
can be achieved by using an accessory off-camera slave flash.
This will be discussed in more detail.
The need for artificial light to maximize color reproduction is
necessary in nearly all pictures. Therefore it is strongly
recommended that you set the flash mode to Flash Always. This
will insure the flash fires on every exposure regardless of the
ambient light conditions. (Please refer to the camera s instruction
manual for more details.)
Outdoor photographers do not have this same concern. There is
no backscatter to be concerned with, and due to the ability of the
flash to travel farther and more effectively in air as compared to
in water, there is normally not a need for an accessory flash to
provide proper illumination for most subjects.