Page 13 - EN_SHOOT_WP2_Handbook for Students

DATA STORAGE 11

The word ‘Photography’ comes from ancient Greek and means

(φwς) Light and (γραφή) Writing. Writing with light, therefore. And
consequently, both the choice of the type of light in which to shoot

a scene and the techniques to best portray it are fundamental.
First of all, we have to examine which device store light and with

measure it
Whereas in analogue photography, light radiation passes through
the lens and strikes a plastic support called ‘film’, which is sprinkled

with a substance containing silver halides, in today's common
digital cameras, light strikes an element called a ‘sensor’. It is

composed of a silicon base on which there are small receptors
(like tiny lenses) called PIXELS
The most common of these is the so-called Bayer matrix CMOS

that you can see in the picture below

Light passes through the lens, then it passes through the Bayer filter
which selects it by means of the three fundamental colours and

finally reaches the photodiodes of the sensor which collect the
photodiodes in the form of an electrical signal and send them to

the processor (a real micro computer) which in turn, once
processed, will send them to the memory card where they will be
recorded.