Ooooooo – Canon T 70 User Manual
Page 83
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[Example S^own: FD 50 mm f/1.4 lens. Maximum ar>d minimum aperturas differ depending pn lens.}
(2)
Shutter
speed
and
aperture
MuTibers such as 1 ?
S
• ^ S u on the dis*
play
panel
represent
shutter
speeds
of
1/125
sec or fi250 sec., v^tiile numbers like 1 4.2B.4.
elc. cn ihe Ians opcrlure ring or in the viessimoer
represent apertures, which ore usually called i*
nurrbersor f.'steps.
Each tlrve you rrovc Irom one f.»‘$too to the next
smaller
f/stop
Uarger
number),
the
arrountof
lignt Is exactly halved. As >cu rrvove irem ere
shutter
speed
to
ihorexth^her
speed,
exposure
Is sisoholvod
v î c y
1 i * ? : a 1 M i 9 f t
1 « 0 ^
I M S
M «
V i V i A \
t * *
l > S 4 1 l < V
1 * 1 1
If. fc< example, the comblnatron cf
tu
and wt 2S
sec. will yield correct exposure, there are certain
other
combinations
of
aperture
end
shutter
speed which will give you tr>e same amount ot
exposure
<EV).
(eg
f/28and
1/250
sec
or
f/5.6 and
1/60
sec)
59