This document provides a technical introduction to photography. It covers basic aspects of exposure including the three tools to control light exposure - ISO, shutter speed, and aperture. It explains how ISO measures the sensitivity of the photographic plane to light, shutter speed indicates how long the shutter is open, and aperture indicates how wide the shutter opens. It also discusses factors like focal length, color temperature, and different exposure modes like shutter priority, aperture priority and manual. The goal is to help understand technical aspects of photography in order to better control the creative aspects.
14. Overexposure
–
too
much
light
loss
of
detail
in
highlights
no
true
blacks
15. The
in-‐camera
light
meter
will
tell
you
if
your
seZngs
will
result
in
a
properly
exposed
photo
or
not.
You
have
three
tools
to
control
light
exposure;
ISO,
Shudder
Speed,
and
Aperture.
16. ISO
measures
how
sensi1ve
the
photographic
plane
(either
a
digital
sensor
or
film)
is
to
light.
ISO
is
also
referred
to
as
film
speed.
The
lower
the
number,
the
less
sensi1ve
the
photographic
plane
is
to
light.
The
typical
range
of
ISO
is
50
to
3200.
With
higher
the
ISO
(more
sensi1ve
to
light),
the
photograph
will
have
more
grain
or
digital
noise.
17.
18. Shu9er
Speed
indicates
how
long
the
shu9er
is
open
for
each
exposure.
Shu9er
speeds
are
measured
in
frac1ons
of
seconds
or
whole
seconds.
Slower
shu9er
speeds
will
result
in
mo1on
blur
in
the
photograph.
For
hand
held
shots,
shu9er
speeds
slower
than
1/60
are
likely
to
be
blurry.
19. Aperture
indicates
how
wide
the
shudder
will
be
open
during
the
exposure.
Aperture
is
measured
in
f-‐stops.
The
lower
the
number,
the
wider
the
aperture
opening.
The
photograph’s
depth
of
field
is
effected
by
the
aperture.
Large
apertures
(small
f-‐stop
#)
result
in
shallow
depth
of
field.
Small
apertures
(big
f-‐stop
#)
result
in
large
depth
of
field.
46. Focal
length
indicates
the
lens’
the
degree
of
magnifica1on
and
the
angle
of
view.
Focal
length
is
measured
in
degrees.
The
smaller
the
number,
the
lower
the
magnifica1on
and
the
wider
the
view.
Since
the
focal
length
effects
angle
of
view,
the
shape
and
posi1on
of
objects
will
differ
at
different
focal
lengths.
47. Color
temperature
is
the
color
of
the
light
based
on
various
ligh1ng
condi1ons.
Color
temperature
is
measured
in
kelvins
ranging
from
1000
to
9300.
Our
eyes
automa1cally
adjust
for
color
temperature.
Digital
cameras
do
too,
but
not
as
well.
Color
temp.
can
be
corrected
or
accentuated
in
post-‐produc1on.