What does iso mean on my digital camera ?
What does iso mean on my Camera and how does it change my image.
ISO is a measurement of the sensitivity to light of a light sensitive surface, whether film or digital sensor. A low ISO (25, 50, 100) is very insensitive and requires a lot of light. We use a low ISO when we want the best possible image, usually with our camera mounted on a tripod. A high ISO (400, 800, 1600) is more sensitive and requires less light. We use a high ISO when photographing sports/action and need a higher shutter speed or when doing low-light, non-flash photography. A high ISO will cause more apparent grain with film and more digital noise with most digital cameras.
ISO is one leg of the "Exposure Triangle". Shutter speed and aperture are the other two. Reading these books will help you to fully understand this. "Understanding Exposure" and "Understanding Shutter Speed", both by Bryan Peterson.
iso is the film speed. You use a faster speed in poor light to get a better image.
Have a look at these websites:
http://www.slrphotographyguide.com/camera/settings/iso.shtml
http://en.wikipedia.org/wiki/ISO_speed
References :
Light sensitivity.
http://www.cameratown.com/guides/iso.cfm
This will explain it for you.
References :
ISO is a measurement of the sensitivity to light of a light sensitive surface, whether film or digital sensor. A low ISO (25, 50, 100) is very insensitive and requires a lot of light. We use a low ISO when we want the best possible image, usually with our camera mounted on a tripod. A high ISO (400, 800, 1600) is more sensitive and requires less light. We use a high ISO when photographing sports/action and need a higher shutter speed or when doing low-light, non-flash photography. A high ISO will cause more apparent grain with film and more digital noise with most digital cameras.
ISO is one leg of the "Exposure Triangle". Shutter speed and aperture are the other two. Reading these books will help you to fully understand this. "Understanding Exposure" and "Understanding Shutter Speed", both by Bryan Peterson.
References :