Pentax MG MG Manual - Page 44

speed/film

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METER COUPLING RANGE The meter coupling range of the Pentax MG assures accurate exposure readings over a broad range of shutter speed/film speed combinations. The working EV range for the auto exposure system varies with the lens being used and is reflected in the adjacent chart. With the 50mm f/2 standard lens with ASA 100 film it runs from EV-3 (f/2 at 1/2 second) to EV-19 (f/22 at 1/1000th second); with the f/1.4 lens, it runs from EV-2 (f/1.4 at 1/2 second) to EV-19 (f/22 at 1/1000th second). You can calculate what the working EV range would be at other film speeds by mentally adjusting the accurate exposure coupling range. Simply move the ASA arrow at the right of the chart up or down and adjust the chart accordingly. At ASA 50 with the 50mm f/1.4 lens, for example, it runs from EV-1 (f/1.4 at 1 second) to EV-18 (f/22 at 1/500th second; f/16 at 1/1000th second). • 42

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METER
COUPLING
RANGE
The
meter
coupling
range
of
the
Pentax
MG
assures
accurate
exposure
readings
over
a
broad
range
of
shutter
speed/film
speed
combinations.
The
working
EV
range
for
the
auto
exposure
system
varies
with
the
lens
being
used
and
is
reflected
in
the
adjacent
chart.
With
the
50mm
f/2
standard
lens
with
ASA
100
film
it
runs
from
EV-3
(f/2
at
1/2
second)
to
EV-19
(f/22
at
1/1000th
second);
with
the
f/1.4
lens,
it
runs
from
EV-2
(f/1.4
at
1/2
second)
to
EV-19
(f/22
at
1/1000th
second).
You
can
calculate
what
the
working
EV
range
would
be
at
other
film
speeds
by
mentally
adjusting
the
accurate
exposure
coupling
range.
Simply
move
the
ASA
arrow
at
the
right
of
the
chart
up
or
down
and
adjust
the
chart
accordingly.
At
ASA
50
with
the
50mm
f/1.4
lens,
for
example,
it
runs
from
EV-1
(f/1.4
at
1
second)
to
EV-18
(f/22
at
1/500th
second;
f/16
at
1/1000th
second).
•
42