Canon EOS REBEL T3 Basic Instruction Manual page 417

Control depth of field,
depending on how wide the aperture diaphragm is opened.
Aperture control for desIred bockground bluffing The benefIts of b"ghter lenses
An aperture diaphragm is
0
mechanism Ihol controls the In a lem. description - such as nEF-S60mm f/28
amount of
light
entering
Q
camera through Ihe lens_
By
Macro USM -
nfj2.S·
refers to the widest opening
adlUlhng !he opening of !he aperlure, one con vary
~e dep~
of the lens operture. When thIS
"f"
number is low, the
of
the zone
of
irHOCUS
elemenb.
~!he
oper1\Jre is
wide
open lens is considered "bright" or "'ost," Bright lenses nol
If/2S, lor example),
Ihe
focused area becomes shallow, only capture beautifully blurred backgrounds but olso
resul'ing in greoter blurring
of
images in Iront
of
and behind the lei you choose foster shuHer speeds even in dark
subjecl in locus In contrast il
the
aperture is
~ll
(f/22.
fOf
ploces, reducing the risk of undesired blurring
examplel,
the
focused oreo becomes
deep,
resulting in greater through "camero shake,"
clarity of images in fronl of and behind the subject," focus
I "
xposure compensation
Exposure determines the overall brightness of photos.
Exposure compensation allows the photographer to get "brighter" or "darker" results.
Freely control the brightness of photos AEB automatically creates three photos
Automatic exposure is Intended to creote ophmol photo with differenl exposure levels
exposure. However. you can intentlonolly change the If you use the AEB (automatic exposure bracketlngJ
exposure levellhrough exposure compensation, When function on your camero, one shot generates Ihree
you want 10 gel brighter results, just set the exposure images with different exposure levels. Afterwords,
level on the "plus" side; when you wont to get darker you can pick the best result from among these three
results, set the exposure level to the "minus" side. choices.
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