Size of CCD chip. Not 1/2" ?

N. Foldager wrote:

Width = 8.6 x 795 = 6.84 mm
Hight = 8.3 x 596 = 4.95 mm

Diagonal = sqrt( 4.95^2 + 6.84^2 ) = 8.4 mm = 8.4/25.4" = 0.33"

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Can someone tell me where to find that half inch ( = 12.7 mm) ??

A 1/2" CCD isn't actually half an inch.

For video tubes used in analog TV cameras, the "size" was the outside
diameter of the glass bulb enclosing the tube's electronics. The actual
image size was about 2/3 of this diameter.

The size of a CCD chip is specified in the same "tube diameter" manner,
so that a given number corresponds to the same image size, whether the
sensor is a CCD or a tube.

In other words, a 1/2" CCD provides the same image size as a 1/2" tube.
A 1/2" CCD with a 4:3 image aspect is typically 6.4mm x 4.8mm, or 8mm
diagonally.

- Ernie http://home.comcast.net/~erniew