Pentax 645 Operating Manual page 41

3. Turn on the main switch.
By slightly depressing the shutter release button,
the shutter speed and aperture value are indicated
by the LED within the viewfinder. Additional
pressure will cause the shutter to release, thus
completing exposure.
Sdd
So
f Z> D
fCC
Visual warnings during Shutter-priority AE control;
The following aperture indication appears within the
viewfinder, whenever a given situation is beyond
the shutter/aperture coupling range.
(flow-like
flickering)
In the event the shutter speed is found to be
somewhat higher, adjust the same to a slower point
by setting the same in the direction of the 15"
speed area.
When the speed is found to be slower, select a
higher speed by moving the same toward the
1/1(XX) indication.
Should the situation return to normal, that is,
within the shutter/aperture coupling range, by
changing the shutter speed, the flow-like flickering
in sequence will cease; proper exposure is Indicated
and photographs may be taken in this AE mode.
Whenever a given photographic situation exceeds
the meter coupling range, the shutter speed and
aperture value within the viewfinder appear as
follows.
(flow-like
flickering)
iooo
. ;
lOOO z
/S''
F^.B
Z n: I f Z-
► - j J z
I Fc-'S:
(Refer to page 27, "'Beyond the meter coupling
range".)
39