Pentax ZX-7 ZX-7 Manual - Page 37

Maximum, Aperture, Effective, Range, f/1.4, approx., f/3.5, f/4.7, f/5.6

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Flash effective range for the Auto Picture Mode and Picture Mode with ISO 100 (400) film used Maximum Lens Aperture f/1.4 f/2 f/3.5, f/4.7 f/5.6 Effective Range approx. 0.8 - 3.9m (0.8 - 5.6m) 2.6 - 12.8ft (2.6 - 18.48) approx. 0.8 - 3.3m (0.8 - 4.8m) 2.6 - 10.8ft (2.6 - 15.7ft) approx. 0.7 - 2.4m (0.7 - 4.0m) 2.3 - 7.9ft (2.3 - 13.1ft) approx. 0.7 - 2.0m (0.7 - 4.0m) 2.3 - 6.6ft (2.3- 13.1ft) The effective range of the flash depends on the maximum aperture of the lens is in use. A lens with a maximum aperture of f/1.4 is marked as 1:1.4 on its barrel. • This effective range table is only applicable when the Auto Picture Mode or Picture Mode is set.When any other exposure mode is used,see page 68. • The minimum effective range is always 0.7m (2.6ft) even if a lens with a maximum aperture f/2.8 or smaller is in use. When a subject is shot at a distance closer than 0.7m (2.6ft), the correct exposure cannot be obtained, and you will see vignetting in the picture corners. CO to O m O z 0

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Flash
effective
range
for
the
Auto
Picture
Mode
and
Picture
Mode
with
ISO
100
(400)
film
used
Maximum
Lens
Aperture
Effective
Range
f/1.4
approx.
0.8
-
3.9m
(0.8
-
5.6m)
2.6
-
12.8ft
(2.6
-
18.48)
f/2
approx.
0.8
-
3.3m
(0.8
-
4.8m)
2.6
-
10.8ft
(2.6
-
15.7ft)
f/3.5,
f/4.7
approx.
0.7
-
2.4m
(0.7
-
4.0m)
2.3
-
7.9ft
(2.3
-
13.1ft)
f/5.6
approx.
0.7
-
2.0m
(0.7
-
4.0m)
2.3
-
6.6ft
(2.3-
13.1ft)
The
effective
range
of
the
flash
depends
on
the
maximum
aperture
of
the
lens
is
in
use.
A
lens
with
a
maximum
aperture
of
f/1.4
is
marked
as
1:1.4
on
its
barrel.
•
This
effective
range
table
is
only
applicable
when
the
Auto
Picture
Mode
or
Picture
Mode
is
set.When
any
other
exposure
mode
is
used,see
page
68.
•
The
minimum
effective
range
is
always
0.7m
(2.6ft)
even
if
a
lens
with
a
maximum
aperture
f/2.8
or
smaller
is
in
use.
When
a
subject
is
shot
at
a
distance
closer
than
0.7m
(2.6ft),
the
correct
exposure
cannot
be
obtained,
and
you
will
see
vignetting
in
the
picture
corners.
CO
to
O
m
O
z
0