[Shirish Mhatre]

It is nothing but amplification of the signal, received by the sensor (e.g. by CMOS or CCD) by electronic means. At 100 ISO, the amplification is 0, subsequently the amplification increases in proportion with the value, you set. E.g. at 800 ISO, the amplification of the signal, received by the sensor is 8 times.

[Shirish Mhatre]

Sir, doesn’t the bird provide contrast? I use single focusing point and Autofocus – continuous mode

• This reply was modified 2 years ago by  Shirish Mhatre.