Keith Whaley <[EMAIL PROTECTED]> wrote:

>Speaking of which, could someone please tell me about why CCD sensor
>sizes are shown as a fraction.
>For instance, 1/2.7 inch.
>This is, of course, reducible to 0.3704". Roughly.
>Which represents what? The area of the chip? 0.3704 square inches? Or,
>inches square?
>Why make a fraction out of it, whatever "it" is?

The designations to which you are referring are based on a standard for
vidicon tubes, the original electronic image sensors.
There's an explanation here:
http://www.dpreview.com/news/0210/02100402sensorsizes.asp

-- 
Mark Roberts
Photography and writing
www.robertstech.com

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