What Is ISO Mode?

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An ISO mode refers to the photographic negative material used to capture an image. Learn about ISO mode with help from a director of photography in this free video clip.

Part of the Video Series: Photography Basics
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Video Transcript

Hi I'm Dan Reinecke with Unknown Media. Today lets talk about ISO. Now what is ISO? ISO sensitivity refers to the photographic negative material used to capture an image. Something like film. Now digital SLRs, they don't have film. So they have image sensors. Now these image sensors, this is where the ISO is actually referring to. Back when you had film cameras to change the ISO you actually had to take out the film and put in a new roll of film. Now with digital cameras you can simply do this with a button. Now what this is actually going to do the ISO sensitivity is referring to how sensitive the sensor is acting to the light coming into the camera. So if you have a high ISO it's actually going to be a lot more sensitive to the light. Meaning you can shoot in a much darker atmosphere then if you were to use a low ISO. Which is going to make you use a lot more light to expose the image just as much. So an ISO is actually referring to the sensitivity that your sensor is actually reacting to the light. I'm Dan Reinecke, take your best shot.

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