Sony ExwaveHAD DXC-990 Instructions D'utilisation page 12

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SHUTTER
Selects the electronic shutter modes.
OFF
Any electronic shutter mode does not
function.
STEP
Select to set the shutter speed to any of 4
steps in long-exposure mode and 11 steps in
high-speed mode.
SPEED
Sets the shutter speed.
To set the shutter speed
1 Select SPEED by pressing the V or v
button.
2 Display OFF by pressing the B and b
buttons simultaneously.
3 Press the B button to set the speed for
long-exposure mode, or press the b button
to set it for high-speed mode.
4 Each press changes the shutter speed.
VARIABLE
Use for fine adjustment of the video output
level in units of 1 frame (long exposure
mode) or in units of 1H (horizontal scanning
µ
time: 63.56
s for DXC-990, 64.00
DXC-990P) (clear scan mode).
In long exposure mode, for example, if you
set to 10 frames (about 0.33 seconds), the
video signal produced during this set time is
output in the form of one complete frame at
intervals of about 0.33 seconds. These
pictures, which contain 10 frames of video
information, are much brighter than normal
one-frame images. This mode is useful for
shooting a poorly illuminated object in a
dark place.
The clear scan mode can be used for
shooting computer displays with reduced
horizontal bands appearing across the
display screen. Adjust the value while
observing the noise on the monitor screen so
that you can obtain the image with minimum
noise.
SPEED
Sets the shutter speed.
GB
12
EXPOSURE Menu
To set the shutter speed
1 Select SPEED by pressing the V or v
button.
2 Display OFF by pressing the B and b
buttons simultaneously.
3 Press the B button to set the speed for
long-exposure mode, or press the b button
to set it for clear scan mode.
4 Each press changes the shutter speed.
To convert the value into the shutter
speed
Long-exposure mode
Example: When the value is set to 5 frames
5 × 1/30 = 0.1666 seconds (DXC-990)
5 × 1/25 = 0.2000 seconds (DXC-990P)
Clear scan mode
Example: When the value is set to 250H
DXC-990:
250 × 63.56
= 15924.9
DXC-990P:
250 × 64.00
= 16035.0
Note
Do not use AGC, CCD-IRIS, ATW, AWB
DCC+ and DYNALATITUDE functions in
long exposure mode.
Set the gain level to 0 dB.
µ
s for
CCD-IRIS
Automatically adjusts the luminance level
for optimum output level. When incoming
light is excessive, this function
automatically adjusts the shutter speed to cut
exposure equivalent to up to 10 aperture
stops.
LIMIT
Sets the maximum shutter speed to be
adjusted to 1/250, 1/500, 1/1000, 1/2000,
1/4000, 1/10000, 1/20000,1/40000 or
1/100000.
IRIS
Selects the iris mode.
µ
µ
s (1H) + 34.9
s (constant)
µ
s = Approx. 0.016 seconds
µ
µ
s (1H) + 35.0
s (constant)
µ
s = Approx. 0.016 seconds.

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