Canon t70 - Manual (Page 58)

12. Basic Phitognphy
The Caron T70 is on SLR carr^e^a cesi^red so
(^at piciure idkirg is easy ev^ lc< those who do
not khosv a lot about shutter speed, aperture and
exposure Reading the follcv/ing insttuctfcns.
hoviover. v/ill help make your pictures more
creotrve. (1) Exposure
Taking a picture is a matter of controlling the
amount i^ht allcv/ed to fall on the film This is
called exposure. When you press the shutler
button some blades inside Iho lens, ceiled a dt-
aphragrr. close devm to form an opening, colled
the aperture
Almost simuitareojsly. the first shutter curtain
starts to move inside the camera. A second shut­
ter curtain follows rl after a fixed inter*/ai which
you can control on the display panel. The
amouni of ighl №at exposes a frange depends
on the shutter speed and the size of Iho aperture
Per the sa-ne exposure, a change m the shutter
speed requires an ocuai and opposite cnange
the aperture. When in the shutter*priorit^* AE
mede. Ihc T70 outomaLCd^ty rtNakes this change
in aperiure when you change the shutter speed.
In program mao AE. the camera aulcmaticaily
chooses a combination of shutter speed and
aperture Icr correct ex^sure. There are usuairy
several ccmbralicns of shutter speed and aper*
ture v^hich
w\\ give the same oxr^sure and this
is the key to crodtrve photography.
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