manual power steps
The
Pro160
and the
fusion
with integrated digital converter have a automatically
TTL/Manual switch. The unit changes automatically between TTL and manual, depends of
the main functionswitch on the rear of the unit. By using the manual power steps the
preflash is switched-off.
together with an digital camera without using an converter only the
“synchronous” and the “ground” contact must be connected with the camera.
For malfunctions or damages by another kind of connections or wrong connections
subtronic excludes liability and/or payment of damages.
if the digital converter is build-in in the camera housing or between the camera
and the flash unit, you should only use the ¼ - or, with slow cameras, ½ power
step.
As your flash triggers to all signals ( also preflashes ) in the case of an full flash the
capacitors inside the flash are empty after the first shoot and have not enough
energy to expose your picture.
please read in the manual of your camera whether your camera supports manual flashes.
functionality :
the flash delivers in manual mode a constant lightning energy.
These power steps are controlled by the integrated computer and therefore every time
identical. The energy depends only one the position of the main function switch.
1
equates full power and
1/32
equates the smallest energy
The correct aperture for the camera can be calculated with the following formula.
Guide number
Aperture =
Distance in m
This formula is only valid for distances over 1m ( 3,28 feet ) under water.
In the manual position “1” the unit delivers its full achievement.
The gradation of the power steps amounts to one aperture each step.
The power output of the unit can be reduced thus around maximally 6 steps.
So the appropriate screen can be found for mixture lights and close-ups.
Example:
distance 1 m (2m way of the light) (depends on DIN21/100ASA, clear water)
mode switch
camera f-number
1
16
1/2
11
1/4
8
1/8
5.6
1/16
4
1/32
2.8
Note:
Because of the larger illuminating angle over water you receive values, which are
more then one aperture higher than the above table data for underwater when
measurements with a lightning exposure meter ashore.
8
Содержание Pro 160 Fusion
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