Sony DXC-390 Instructions For Use Manual page 18

Adjusting and Setting with Menus
Function
Selection
Clear scan mode
VARIABLE
You can set the shutter speed in units of 1H
(Continued)
(horizontal scanning time: 63.56 µs for DXC-390,
64.00 µs for DXC-390P).
Select SPEED, then select the value from 1/525H to
262/525H (DXC-390) or 1/625H to 312/625H (DXC-
390P). This mode can be used for shooting
computer displays with reduced horizontal bands
appearing across the display screen.
To set the shutter speed
1 Display OFF by pressing the
simultaneously.
2 Select the SPEED value by pressing the
while observing the noise on the monitor screen
so that you can obtain the image with minimum
noise. Each time you press the button, the value
changes in units of 1H.
To convert the value into the shutter speed
Example: When the value is set to 250H
DXC-390:
250 63.56 µs (1H) + 34.9 µs (constant)
= 15924.9 µs = Approx. 0.016 seconds
DXC-390P:
250 64.00 µs (1H) + 35.0 µs (constant)
= 16035.0 µs = Approx. 0.016 seconds
Automatically adjusts the luminance level for
CCD-IRIS
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.
18
(GB) Chapter 2 Operation
Selection
CCD-IRIS
(Continued)
B b
and buttons
b
button
LENS
Selects the iris mode.
Selection
VIDEO
REMOTE
Function
For example, this function is useful for microscope
applications. When shooting with a microscope not
equipped with the auto-iris lens, the luminance level
that is just right for the human eye is often too bright
for the video camera.
When CCD-IRIS is selected, the electronic shutter
automatically decreases excessive incident light to
an appropriate level for the video camera. This
function is also useful for cutting out excessive
incident light that is not cut out by the auto-iris lens
in scenes containing very bright patches (such as
snow, or sea water reflecting sunlight).
You can select the highest limit value of the variable
range of the shutter speed. Select LIMIT, then set
the speed to 1/250, 1/500, 1/1000, 1/2000, 1/4000,
1/10000, 1/20000,1/40000 or 1/100000.
Note
You cannot use CCD-IRIS mode when using a lens
that automatically adjusts the iris control according
to the video signal input.
Function
Select when you use a lens that automatically
adjusts the iris according to the input video signal.
Select AE LEVEL, then adjust the auto exposure
focusing point in the range from –127 to +127.
Select when you use a lens that adjusts the iris
according to the DC power supplied.