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EVRANGEOFTHECAMERA--------------------
How
to
read
the
EV
chart
•
Full-aperture
metering
Example: Lens maximum
aperture
fll.4
ASA film
speed
100
Working
aperture
fl5.6
By
referring
to
the
fll.4
column
in Section A
and
the
EV
values
indicated
for ASA
100
in Section
D,
you will find
that
the
EV
range
for
an
fll.4
lens
at ASA
100
is I to
18.
Now,
refer
to
Section
B
and
single
out
the
fl5.6 indication
for ASA
100
.
Go
diagonally
down until
the
protruding
line
intersects
with Section
C's
vertical line for
the
shutter
speed
of 8
sec.
(the F3's slowest shutter
speed).
From this
point
of
intersection, follow the horizontal line that
leads
to Section D's
EV
value for ASA 100,
and
you will obtain
an
EV
value
of 2. Start
again
from the fl5.6 indication for
ASA
100
in Section
B,
and
go
down
diagonally
until
the
protruding
line intersects with Section
C's
vertical line
for
the
shutter
speed
of 112000 sec. (the F3's fastest shutter
speed)
this time. Then follow
the
horizontal line that
leads
to Section D's
EV
value for ASA 100,
and
you will
get
a
reading
of
EV
16.
This
means
that
an
flstop
of
fl5.6 at ASA
100
and
a shutter
speed
of from 8 to 112000 sec.
has
an
effective
EV
range
of 2 to
16,
which is well within
the
F3's
metering
range
of
EV
I to
EV
18.
The
area
encompassed
by the
heavy
lines in Section C
demonstrates
a
metering
range
for full
aperture
method
using
an
fll.4
lens
and
ASA
100
film.
•
Stop-down
metering
Example: ASA film
speed
100
Stopped-down
aperture
fl8
The
procedure
is
the
same. The fl8
column
in Section A
and
the
EV
values
indicated
for ASA
100
in Section D will
show you
that
the
EV
range
for fl8 is 6 to 23. Refer now to
Section B
and
single
out fl8 at ASA 100.
Go
diagonally
down until
the
protruding
line intersects with Section
C's
vertical line for
the
shutter
speed
of 8 sec. From this point
of intersection, follow
the
horizontal line that
leads
to
Section
D's
EV
value
for ASA 100,
and
you will
obtain
an
EV
reading
of
3. This
means
that
an
flstop of fl8
at
ASA
100
and
a shutter
speed
of 8 sec.
give
an
EV
value
outside
the
metering
range.
To
find out
the
slowest shutter
speed
usable,
follow
the
fl8 indication for ASA
100
in Section B
33
diagonally
down until it intersects
the
horizontal line in
Section C
that
leads
to Section D's
EV
value
of 6 for ASA
100,
and
you will find
that
the
slowest shutter
speed
usable
is I sec. In
other
words, at fl8
and
ASA 100,
the
available
shutter
speed
range
that
is within
the
metering
range
is from I to 112000
sec.,
which
has
an
effective
EV
range
of 6 to
17
{indicated
by
the
broken
line in
Section
C)-well
within
the
metering
range.
In
practice,
you will find that it is
generally
the
high
end
and
the
low
end
which
require
a careful
check.
The
EV
range
of
the
Nikon F3
encompasses
most lighting situ-
ations,
and
it is only
under
dim-light
or
extra-bright
picture-taking
situations
that
you
need
pay
any
special
attention.