o The Amount of light allowed to fall on the
film / sensor. *
CONTROLLED BY MANY
oFilm speed – ISO *
oControls the intensity
of the light entering
the camera. *
o Aperture is a circular opening.
o It’s opening controls the amount of
light that can pass through the lens
o A large aperture (opening) will admit
more light than a small aperture. *
o Specified by f-stops
o “f” stand for FRACTION
o The larger the f-number the
smaller the aperture opening.
o For example: f/8 (1/8) aperture is
smaller than an f/4 (1/4) aperture.
o Controls the length of time the light is
allowed to enter the camera. *
o Device something like a window blind. *
o A number that represents fractions of a
second that the shutter remains open.
o For example:
n “1” = 1/1 or one second
n 1/15 = one fifteenth of a second
n 1/125 – and continues
o 1/30 second or faster are needed when
the camera is hand-held to avoid blurring
from camera movement. *
o A measure of a film’s / sensors
sensitivity to light. *
o Fast speeds (1600) is very light
sensitive, chosen in dimly lite situations.
o Slow speeds (100) needs much more
light to produce a good image. *
o Film/Sensor speed in measured in ISO
o ISO – International Standards
o The Higher the ISO, the faster the
speed, the less light is needed.
o Quality is lost (grainy) as ISO speeds