JJC
PW-A1 Pre-Trigger Cable is designed for
Pocket Wizard
What
does Pre-Release do?
In
simple terms it "wakes up" the camera. In most newer
electroniccameras the meters and auto-focus systems do not operate until
you press the shutter release button down halfway. The time between the
moment the camera's button is fully pressed until the shutter is actually
open is called Lag Time and can change dramatically from trigger to
trigger. Inconsistent Lag Time is due to the electronics inside the camera
which take varying times to perform metering and especially auto-focus
functions. PreReleasing keeps the camera "awake" all the time
which is the same as continually holding the camera's shutter release
button down halfway. The Lag Time is reduced and becomes more consistent
as well. Consistency is even further increased by setting as many of the
camera's functions as possible to MANUAL modes.
A
drawback to this mode of operation (as stated above) is that the battery
life of the camera is extremely diminished. This is due to the power
required to keep the camera "awake."
If
you simply trigger a camera via the motor drive port without "waking
it up" (the cable's switch is set to Normal) it will perform the
functions it is programmed to do after a brief delay. Some auto-focus
cameras can be programmed to fire only when they are in sharp focus which,
upon "waking up" the camera, can take a widely varying time due
to the mechanics of moving the lens.
Experimentation
with your camera's autonomic functions is the best way to determine an
operation mode suitable for your situation.
1.
Plug the motor drive cord into the camera.
2.
Plug the mini-phone connector into a PocketWizard Receiver, Time Machine,
WaveSensor, or
other
triggering device.
3. If
you want the camera to respond more quickly and accurately, position the
cable's switch in the Pre-Release position. A drawback to this mode of
operation is the likelihood of draining the camera's batteries at an
accelerated rate. If the cable's switch is set to the Normal position, the
camera will respond in a standard fashion.
JJC
PW-A1 Pre Trigger Cable compatible with Canon EOS cameras
| EOS-3 |
EOS-1V |
D2000 |
D30 |
D60 |
| 10D |
20D |
30D |
5D |
1DS |
| 1D Mark II |
1D |
|
|
|
|
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