NAC Image Technology SP-642 User Manual page 128

Select any of the following for the image trigger.
Level of Brightness Change
OFF
LOW
MID
HIGH
CUSTOM
Brightness Standards (HX camera only)
Tracking
ARM start
Manual
If the image trigger set value does not match the recording conditions, there is a possibility that an
unexpected trigger is issued [A] or a trigger isn't issued in the required location [B]. Determine
the appropriate value after conducting a test photograph. The criteria is shown below.
Set Value Matching Photographic
・ Recording in an environment
where
LOW
elements due to fluorescent
lighting
・Recording where the brightness
of the general lighted area does
MID
not change, such as with
flashes
・ Recording where the subjects
HIGH
cross the lighted area
The image trigger function cannot be used simultaneously with the automatic exposure
Caution
function (AE). To enable the image trigger function while using the AE function, a
confirmation message will be displayed to disable AE. Click "OK" and disable AE
(OFF) and then use the image trigger function.
Also, when using the image trigger, the range (AOI) must be specified. Refer to page 4-46 for
details of AOI.
4 - 52
Image trigger function not used
(Low) trigger issued with large changes in brightness
(Standard) trigger issued with medium changes in brightness
(High) trigger issued with small changes in brightness
Fine adjustments of the trigger issuing conditions (HX camera only)
Sets the camera corresponding to the photographic environment as the
standard. (GX compatible) Prevents trigger from issuing for phenomenon
with gradual changes in brightness (clouds, time, changes in standby
status) .
Brightness at the start of ARM is the reference
Brightness after the start of ARM is the manually set reference
Environments
there are flickering
Non-conforming
Photographic
Environments
・ Recording where large
changes in the brightness
are not expected [B]
・ Recording
where
subjects cross the lighted
area due a lack of size
[B]
・
Recording in
environment where there
are elements in motion,
other than subjects
within the lighted area
[A]
Unusable
Photographic
Environments
the
・ Recording
environment
there are flickering
an
elements due
fluorescent
[A]
(00292)H
in an
where
to
lighting