WHAT IS ISO?

ISO is all about sensitivity, in the case of the Digital SLR – it’s about the sensitivity of the sensors. By setting the ISO, you’re telling the camera how sensitive it should be when it comes to absorbing light. The higher the ISO setting, the more sensitive the sensor is towards light.

Think of the camera sensor as your retina. The ISO setting basically tells your retina how sensitive it should be Too bad it’s not possible to tell your retina how to behave.

Do remember that higher sensitivity also means higher NOISE level, it’s not that it’s bad. Some people are picky on noise. Others just couldn’t be bothered. Noise is more noticeable on the darker areas of a picture, you’ll see those tiny little dots that resemble little grains.