As shown in the graph at right,
the X-700's program is designed to
maintain the fastest practicable
shutter speed as light dims. The
graph gives you a general idea of
which aperture is being set for a
given LED-indicated shutter speed.
For example, if the "125" LED
lights, the aperture will be approxi-
mately f/2.8 (for a 50mm f/1.4
lens, at ISO 100/21 ).
The accurate working range of
shutter-speed and aperture com-
binations at ISO 100/21° with an
f/1.4 lens is EV 1 (f/1.4, 1 sec.) to
EV 18 (f/16, 1/1000 sec). At ISO
25/15°, the range is EV -1 to 16;
at ISO 400/27° it is EV 3 to 18.
The maximum EV depends on
the minimum aperture of the lens:
for f/16 it is EV 18; for f/22, EV
19; for f/32, EV 20.
30
COUPLED RANGES AND PROGRAM GRAPH
Program for 50mm f/1.7 lens set
at minimum aperture of f/22
Program for 50mm f/1.4 lens set
at minimum aperture of f/16
Program when lens is set at f/5.6
rather than minimum aperture
32
Programs
shown
for
ISO 100/21°
SHUTTER SPEED
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