Sony BRCH900 Product Manual (BRC-H900 Operating Manual) - Page 7

Getting Started 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. 7 Phenomena Specific to CMOS Image Sensors GB