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Sony PDW-680 Operation Manual Page 255

Professional disc camcorder.
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Fitting the zoom lens
It is important to fit the lens correctly, as
otherwise damage may result. Be sure to refer to
the section "Mounting the Lens" on page 40.
Viewfinder
• Do not leave the unit with the eyepiece pointing
directly at the sun.
The eyepiece lens can concentrate the sun's
rays and melt the interior of the viewfinder.
• Do not use the viewfinder close to strong
magnetic fields. This can cause picture
distortion.
On Burn-in (when using a viewfinder with
a built-in OLED panel)
Due to the characteristics of the material used in
the OLED panel for its high-precision images,
permanent burn-in may occur if still images are
displayed in the same position on the screen
continuously, or repeatedly over extended
periods.
About the LCD panels
LCD panels are manufactured with extremely
high-precision technology that yields effective
pixel rates of 99.99% or higher. However, very
rarely, one or more pixels may be permanently
dark or permanently lit in white, red, blue, or
green.
This phenomenon is not a malfunction. Such
pixels have no effect on the recorded data, and the
unit may be used with confidence even if they are
present.
Phenomena specific to CMOS image
sensors
The following phenomena that may appear in
images are specific to CMOS image sensors.
They do not indicate malfunctions.
White flecks
Although the CMOS image sensors are produced
with high-precision technologies, fine white
flecks may be generated on the screen in rare
cases, caused by cosmic rays, etc.
This is related to the principle of CMOS image
sensors and is not a malfunction.
The white flecks especially tend to be seen in the
following cases:
• When operating at a high environmental
temperature
• When you have raised the master gain
(sensitivity)
The problem may be alleviated by executing the
APR (automatic pixel noise reduction) function
on the APR page of the MAINTENANCE menu
(see page 179). Pixel noise is reduced to some
extent by automatic black balance adjustment
(see page 54), but the detection capabilities of
that function are limited. For the most effective
correction, execute the APR function.
If "No More White Pixel" appears after the APR
function is executed, then there are no more
detectable white flecks.
In SLS mode, white flecks are more prominent
when you set the shutter speed (number of
frames) to higher values. Executing the
APR(SLS) function on the APR page (see page
179) may alleviate the problem of white flecks in
SLS mode.
Aliasing
When fine patterns, stripes, or lines are shot, they
may appear jagged or flicker.
Flicker
If recording is made under lighting produced by
discharge tubes, such as fluorescent, sodium, or
mercury-vapor lamps, the screen may flicker,
colors may vary, or horizontal stripes may appear
distorted.
In such cases, set the flicker-reduction function to
auto mode (see page 183).
If the frame rate selected for recording is close to
the power-supply frequency, flicker may not be
reduced sufficiently even if you activate the
Flicker-Reduction function. In such cases, use the
electronic shutter.
Important Notes on Operation
255

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