Canon EOS Rebel XTi Instruction Manual page 236

If
you use
the AEB (automatic
exposure bracketing)
funcnon
on your camero{ one shot generates three
images
with different exposure levels.
Afterwards,
can
pkk
the best result from among
these
three
In a lens description - such as llEF·S60mm f/2,8
Macro USM - ilf/2.8
1i
refers
to
the widest
of
the
lens When this
'T'
number
is
lens is flbrighr" or "fast"
lens0s not
only capture beautifuily
blurred but
also
lei you
choose faster
shutter even in
dark
place;, " the risk of undesired blurring
through' camero
Nreutrul
An aperture diaphragm is a mechanism that controls the
amount of entering a camera through the len$,
By
adjusting the
of
the one con vary the- depth
of
the zone elements, If a
perhJre
wide open
[f/2.8; ror exampleL the focused area becomes
shall~w,
resuiting
in blurring in
~ont of
and behind
the
in In contrast,
if
aperture
i$
small (f/22! for
the focused aree becomes deep, in
clcrily images
in
front of and
benhd
the sublect in
Automatic exposure is
intended
to create ophmal photo
exposure. Ho'wever, you can fntelliiondly change the
exposure levelrhrough
exposure
compensation.
When
you want to brighter fesults, just set the
level or. the side; when you want to
results, set the exposure leve! to the
!v'l;nlH (-I CQrnpensolioc
130mm
1
x
IOOmm
0.5:<
In other words, 100mm or 180mm macro lenses have
narrower
of
view than thot
of
a 60mrn lens, So
if
the same from the same
distance, the appears larger with a 100mm
0'"
180mm macro
lens.
O. ?8x
50mm
lens. maximum
!TIa!~njtica1ion
8-55mm F3.5-5.6 HUSM
is
maqni:rication ratio for the
EF·S60mm
33
I 34 I