Sony DXC-9000 Mode D'emploi page 79

Selection Function
VARIABLE
In clear scan mode
(Continued) You can set the shutter speed in units of 1 H
(horizontal scanning time: 63.56µs). The setting is
made in units of 1H. This setting can be used to
reduce noise (horizontal patterns) when shooting a
computer screen.
1
Display 262/525 by pressing the DATA UP and
DATA DOWN button together.
2
Select the setting which best reduces reduce the
noise by pressing the DATA UP button while
observing the noise on a monitor screen.
Each time you press the DATA UP button, the
shutter speed changes in units of 1 H from 262/525
through 1/525.
Shutter speed calculation
Example: Shutter speed in 250/525 (H)
250 x 63.56 µs (1H) + 34.78 µs (constant) =
15924.78 µs = about 0.016 seconds.
Selection Function
When an excessive amount of light passes through
CCD IRIS
the lens, this function increases shutter speed to cut
exposure to the equivalent of up to 4 aperture stops.
The function is useful for microscope applications
where lighting that is just right for the human eye is
often too bright for the video camera.
When CCD-IRIS is set to ON, the excessive incident
light is automatically decreased to an appropriate level
for the video camera. The CCD iris function is also
useful for cutting out excess 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 use CCD IRIS in combination with AGC, and/
or AUTO IRIS control.
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