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Using Z240 / Z330 strobe, pay attention:
1) Pre-flash control magnet must be in “Push” (down) position and locked by rotation.
2) Using optical synchronization, set right dial switch on the strobe body to “0ev” (position “12 o’clock”), but using
electrical wire synchronization set right dial switch to “TTL” mark as fixed position (“9 o’clock”).
3) In case of optical synchronization, TTL correction (+/-) is available by the Inon strobe right dial switch “+/-Ev” and also
by the camera control “Flash Compensation” (+/-). Recommended to use the camera correction, because it is
significantly more effective than Inon strobe corrector. The final correction value is the sum of these two corrections.
Pay attention: In case of electric wire synchronization, the adjustment (+/-) by the strobe corrector is unavailable on
most of underwater strobes, but always available by camera control “Flash Compensation”.
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Connect TTL-Converter Hot Shoe plug to the camera Hot Shoe socket. Switch ON the camera. TTL-Converter activates
automatically (switch ON) when user pushes camera Shutter Release Button for shooting or focusing. Device goes to
standby mode (switch OFF) automatically a few seconds later (based on input from the camera), or after disconnection
from camera Hot Shoe socket.
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Camera recognizes TTL-Converter as Sony compatible TTL device on the Hot Shoe and confirms the compatibility by the
two “Flash” symbols
on the service screen.
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In Flash Mode menu set “Fill-flash”, “Slow” sync, or “Rear curtain” sync, depending on the shooting tasks. Most popular is
“Fill flash” mode.
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Based on the camera model sensor, strobes condition and quantity (1 strobe / 2 strobes in a pair, or more), battery
condition etc., photographer should set any initial (+/-) “Flash Compensation” by camera menu, - for balanced flash lighting.
For example, A7 camera model usually requires +1Ev Flash Compensation, A7RIII and A9 requires zero (0)Ev Flash
Compensation etc. Please make some land test of TTL work before submerging.
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During the diving, photographer can use (+/-) Flash Compensation in wide range (-3ev
…
.+3ev), based on shooting
conditions, subjects and tasks, if images are too bright or too dark.
As written above, in normal operation TTL +/- Flash Compensation adjustment is available for underwater photographer using
2 methods:
-
Using “+/-Ev” dial switch on the underwater strobe body (adjustment works for fiber-optical type connection only).
-
Using camera “Flash Compensation” function. Such adjustment type is recommended as more accurate and effective,
and it works for both types of connection (optical and electric). Available “Flash Compensation” range for Sony
cameras: -3ev
…
0...+3ev. User can adjust it in steps 0.3ev or 0.5ev (set the step by camera menu), viewing the value
on the camera menu scale.
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Set only Mechanical Shutter type in camera menu. This is important for normal TTL work with underwater strobes. Don’t
use fully electronic shutter (option available in some cameras menu). Only 1-st curtain (e-front curtan) can be used on
some camera models, if necessary.
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Shooting macro, for normal TTL accuracy the nearest distance from underwater strobe to a target must be more than
0.35m underwater (or more than 0.7m for the land tests),
to keep the system inside of working TTL range.
But the
camera can be positioned as close to the target as user requires so long as the strobe minimum distance is adjusted
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TTL-Converter is tuned for normal TTL accuracy under water. Land tests may give different results.
