Why is there no "negative" ISO?

Started Jul 14, 2011 | Discussions thread
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Dennis Forum Pro • Posts: 16,668
Re: It's a non-sequitor

Chato wrote:

Dennis wrote:

Wouldn't negative ISO would involve the camera adding light to the scene ?

ISO is a measure of sensitivity to light. Zero ISO means no sensitivity, meaning, no picture. You want less than no picture?

Hi Dave, maybe the reference was too obscure. The Nikon I specified in my subject line is one with a built in projector No seriousness intended.

  • Dennis

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