The relationship between ISO and sensitivity is so complicated, that I totally don't know what the author is talking about. Key points from the article:
1. Digital sensors convert light into electrical charge in a linear fashion (I thought it was log before), which is different from human eye.
2. ISO is a combination of the sensor's physical sensitivity and the tone function to convert the signal, and maybe the metering.
3. There are many ways to define ISO, and it is possible each camera manufacture has its own definition.
in reference to: Sense and Sensitivity: dpreview.com Editorial blog: Digital Photography Review (view on Google Sidewiki)
1. Digital sensors convert light into electrical charge in a linear fashion (I thought it was log before), which is different from human eye.
2. ISO is a combination of the sensor's physical sensitivity and the tone function to convert the signal, and maybe the metering.
3. There are many ways to define ISO, and it is possible each camera manufacture has its own definition.
in reference to: Sense and Sensitivity: dpreview.com Editorial blog: Digital Photography Review (view on Google Sidewiki)
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