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Underwater Recording
Recording underwater is different from recording on land
because it is affected by the clarity and depth of the
water and the light conditions. The following are hints for
good recording underwater.
Color characteristics underwater
Water absorbs light, especially red light, so that objects in
deep water are seen as bluish. The color of objects is
affected by the clarity of the water.
To record in natural color, use the Sony VF-M90 color
filter.
Best time for recording
The best recording time is from 10:00 a.m. to 2:00 p.m.
When the sun is high in the sky, optimum results can be
obtained.
To record at night, use an additional powerful underwater
video light.
Subject size underwater
Since the refractive index underwater is higher than that
in air, an object is visible by Ya more closely, and
therefore larger. This phenomenon affects the lens on the
video camera recorder as well as the human eye. Using a
lens with a wide angle of field is effective underwater.
This ís why a wide-conversion lens is recommended.
Underwater video light
In a deep place or under rocks where direct sunlight does
not reach, recording with the underwater video light is
recommended.
Underwater video light
such as, Sony HVL-M20
Attachable to the
left or right shoe
Camera work in slow and stable motion
When recording, keep your body stable.
An unstable shot will be magnified on the TV screen.
Move the video camera recorder as slowly as possible.
As most of the object underwater move, you can record a
good program without moving the recorder.
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Maintenance
After recording
After recording in the sea, submerge the marine pack
with the buckles fastened thoroughly in fresh water for a
while to remove the sea water. Then wash it with fresh
water and dry it with a soft cloth. Clean the video camera
recorder and the inside of the pack with a dry soft cloth.
Do not use any type of solvent, such as alcohol or
benzine for cleaning, as this might damage the finish. Be
sure to perform the above procedure every time the
marine pack is used in the sea.
if the sea water remains on the marine pack, the metal
parts may get rusty or the operation lever becomes hard
to move.
When storing the marine pack
Grease the O-ring, put them in the groove correctly.
Close the pack without fastening the buckles and piace it
in a cool place.
Avoid storing the marine pack in a hot or very cold place,
in a place subject to direct sunlight or excessive dust, or
together with naphthalene or camphor. This will damage
the marine pack.
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