The manual explains ISO as the sensitivity of the sensor to light.
You control flash, ISO, and white balance. The camera controls aperture/shutter. This is the preferred mode for CCD enthusiasts because you can force lower ISOs to keep that clean, grainy-free CCD look. ccd s820 camera manual
The manual for the S820 will almost certainly highlight that it uses a Charge-Coupled Device (CCD) sensor. In the modern camera market, most devices use CMOS sensors. Why does this matter to you? The manual explains ISO as the sensitivity of
Ensure the battery is charged and the Micro SD card is correctly seated. ccd s820 camera manual
The CCD S820 underexposes by default to preserve highlights.