Quantum Qpaq-X Modular Power Pack
Quantum's new Qpaq-X,
a high-energy portable power supply for the Qflash model X and X2, is
a professional-quality system that lets the user select from 200 to
800 ws of flash power by combining snap-together capacitor and battery
modules. In addition to keeping size and weight down by using only the
components needed, this intelligent design offers a choice of two battery
sizes, normal and fast recycling, individual control of two flash heads,
as well as operation from US and overseas AC sources.
Power configuration determines
number of flashes and recycling time. With normal recycling, a fresh PB1
yields around 350 full-power flashes, then drops to 180, 135, and 90 flashes
as one, two, or three PXCs are added. Recycling times are 3.2, 6.4, 9.6,
and 12.8 sec, respectively. The same array gives 275, 140, 105, and 70
flashes, at times of 1.8, 3.6, 5.4, and 7.2 sec, with Ultra (fast) recycling.
A PB2 yields 160, 80, 60, and 40 full-power flashes (with zero, one, two,
or three PXCs) at the same normal times as a PB1, with the PB2 giving
120, 60, 45, and 30 pops at PB1 Ultra times.
Flash mode is selected by pressing
the mode key, then scrolling through the options with the up/down keys.
In auto, aperture value is displayed in the upper right area of the panel,
the distance range and reflector type (normal, wide, or diffused) appear
beneath it, with ISO showing in the lower left. The set key toggles between
aperture and ISO so that up/down changes either, in 1/3 stop increments,
while continuously adjusting the auto distance range. Should an impossible
combination be chosen, the displayed aperture changes to the required
The accessory QF21 Remote Sensor
attaches to the camera hot shoe and overrides the flash body sensor for
off-camera auto operation. With the appropriate adapter, the model X2
gives TTL exposure control with compatible 35mm and medium format cameras.
The LCD panel confirms proper connection and provides the same over, normal,
and under post-exposure messages. The QF50 patch cable gangs two or more
heads together, yet allows each to function individually in any mode.
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