Beginning Wildlife Photography: ISO

Battling Prairie Chickens

Battling Prairie Chickens

ISO

ISO is the last of the three major settings on your camera that you need to understand.  In short, ISO is the amount of noise (grain in film cameras) that appears on a photo.  Basically, it is the sensitivity of the sensor to incoming light.  On a nice sunny day a typical ISO for modern cameras would be ISO 200.  On a dark cloudy day the setting maybe ISO 800 and inside in a dark room like at a nightclub, the ISO might be 10,000.  The higher the ISO the more noise in the photo.  So, you always want to be aware of your ISO setting.  Take a look at this site for a brief video explanation:  ISO