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• Flash shooting distance range
Flash shooting distance for the built-in Speedlight changes according
to
the
film speed
in
use and aperture setting.
ISO
film
speed
25 50
100
200 400 800
Flash
shooting
distance
range
Guide
number
(m/ft
.) 6/20 8.5/28 12/40 17/56 24/79
34/12,
(m/ft.)
- -
1.4 2 2.8 4
2-8.5/6.6-28
-
1.4 2 2.8 4 5.6
1.4-6/4.6-20
1.4 2 2.8 4 5.6
8
1-4.2/3.3-14
Aperture
value
2
2.8 4 5.6
8
11
0.7-3/2.3-9.8
2.8 4 5.6
8
11
16
0.6-2.1/2.0-6.9
4 5.6 8
11
16 22
0.6-1.5/2.0-4.9
5.6 8
11
16 22 32
0.6-1 .1/2.0-3.6
8
11
16 22 32
- 0.6-0.8/2.0-2.6
•
The
maximum flash shooting distance
can
also
be
calculated by dividing the guide
number by the selected aperture value.
Example:
When
f/2.8
is
selected with
ISO
100 film using the camera's built-in
Speedlight, the maximum flash shooting distance will
be:
12
/2.8 = appro
x.
4.2m or
40
/2.8 = approx.
14
ft
.
I
83