Vaddio BRC-H900 Operating - Manual (Page 7)

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Phenomena Specific to CMOS Image Sensors
7 GB
Phenomena Specific to
CMOS Image Sensors
The following phenomena that may appear in images are
specific to CMOS (Complementary Metal Oxide
Semiconductor) 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 ambient temperature
• when you have raised the gain (sensitivity)
The white flecks may be reduced by turning the camera
off, then on again.
Aliasing
When fine patterns, stripes, or lines are shot, they may
appear jagged or flicker.
Focal plane
Owing to the characteristics of the pickup elements
(CMOS image sensors) for reading video signals,
subjects that quickly move across the screen may appear
slightly skewed.
Flash band
If you shoot a strobe or quick-flashing light, brightness
may differ between the upper and lower halves of the
picture.
Flicker
If recording 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, turn the
FLICKER CANCEL function on (see page 37).
Depending on lighting types, etc., such phenomena may
not be improved with the FLICKER CANCEL function.
It is recommend to set the shutter speed to 1/100 sec. in
the areas of 50 Hz power supply frequency and to 1/60
in the areas of 60 Hz.