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A Simple Explanation of ISO for Digital Photography and Video by Dylan Bennett

Posted on February 21, 2012 in Cinematography, Photography, Tips

A Simple Explanation of ISO for Digital Photography and Video by Dylan Bennett

Given that I have a background in computer science and engineering, the concept of ISO and signal-to-noise ratio (SNR) in digital photography and video is a no-brainer for me. It all boils down to one simple idea: the higher the ISO, the more noise (or grain) you’ll get in an image. For those of you who are still fuzzy about how this works inside your camera, check out this video below for a better understanding. I’d like to add one more thing that the video Bennett didn’t mention: heat and pixel density also contribute to the SNR, but that’s probably another debate.

1 Comment

  1. Joe September 14, 2015

    This is AWESOME! Goodness Me Patty, we are so on the same wave length. I have my goal set for poaritt photography for a while and then you throw a new little goody my way with the term catchlights. I am intrigued and excited to practice this while I am practicing portraits as well. I’ going to post photos soon and link to you today. It’s been a crazy morning. Whew! And even though i am taking like 100 s of pics daily, surprisingly enough, I have nothing I want to share at the current moment. But I will, very soon! I hope you are having a great day.PS I changed my mind, I am going to post one of my portrait pics. You’ve already seen it though so it’s no surprise to you, but there just may be a catchlight in it.

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