Operating instructions

8
3. Energy control
3.1. Variation of the energy
Use the "up/down" keys (17) to control the flash energy (flash intensity) on both lamp
outlets (1 and 2), respectively channels, within a range of 5 f-stops. Whole numbers are
full f-stop intervals, decimals indicate 1/10 f-stop steps.
Brief pressure on the "up/down" keys runs the power up (or down) by a 1/10 f-stop
interval, prolonged pressure by a full f-stop. Both energy displays (15) then blink until
charging or discharging has stabilized the new level.
3.1.1 Topas A2 / Topas A4
The maximum flash energy corresponds to value 10, the minimum to value 5. It is
possible to extend the control range of Topas A2 to 6 f-stops and of Topas A4 to 6,5 f-
stops (see chapter 9). Additionally the control range can be extended in the
asymmetrical mode with the following f-stops values by choosing the respective lamp
outlet: with Topas A2: +1,3 f-stops and with Topas A4 +1,7 f-stops.
3.1.2 Topas A8 Evolution
The maximum flash energy corresponds to value 10, the minimum to value 6. It is
possible to extend the control range by 5 f-stops (see chapter 9). Additionally the
control range can be extended in the asymmetrical mode by one f-stop by choosing the
respective lamp outlet or channel.
3.2 Symmetrical or individual energy distribution
Topas A power packs can be switched from symmetrical to individual (asymmetrical)
energy distribution. Press the keys "sym" or "asym" to select the required operating
mode (3). The green control lamp of the display "sym" (9) lights up when the unit is in
symmetrical operation. In the asymmetrical mode each lamp outlet is individually
controllable. The only exception is the Topas A8 Evolution, in which four lamp outlets
are controlled in pairs over two individual, controllable channels.