ISO, is one of the components for Exposure;  the starting point for most all photography.  In the day of film it was the sensitivity of the film; the actual size of the grain of film. The larger the grain the more light sensitive.

Now with digital photography and CCD (Charge-Coupled Device) sensors it’s the sensitivity of the our internal camera’s chip. Jeff Burkholder explains ISO and how it is key to you and your photography.

Level: basic
Length: 5:04