D4 Profoto D4 – Generators
Automatic Safety Functions
D4 generators are equipped with an effective cooling and safety system. The integrated fan starts when working in hot surroundings or continuously at higher power levels; the speed of the fan increases automatically if necessary. If the generator overheats because of external reasons, a protective system will automatically start up. The generator’s recharging intervals will slow down and eventually the recharging will stop completely. After a while, when the temperature has decreased sufficiently, the generator will start recharging at a normal pace. This automatic protection will only start up under extreme conditions such as when the air vents are blocked.
If a defective flash head – for example with a broken or misfiring flash tube – is used, after releasing the flash a long beep signal and “- - -
PLEASE NOTE: The air vents of the generator must never be blocked or covered in any way. Never store your flash equipment in a car on a hot and sunny day. Never use a D4 generator that is placed inside a case or transport box. Avoid storing the generator close or below the freezing point, which can lead to loss of capacity (flash output) and risk of condensation when used in a warmer surrounding immediately. Do not expose any flash equipment to wet or humid environments or extreme
Computer Connection
From one to 127 D4 generators can be connected to one computer using USB cables and HUB’s.The generator has a USB 1 socket [15]. Profoto offers an assortment
of recommended USB cables for best results. Other USB cables can be used – but in this case Profoto can’t guarantee correct functionality. See pages
Profoto D4 – Generators D4
Additional Information
Colour Temperature
The D4’s colour temperature is calibrated for daylight type films and, because of the “Hybrid Flash Technology”, remains perfectly constant and reliable from flash to flash and over the entire power range, regardless of the power output chosen with the Power Dials
[13]and the number of flash heads used. This makes the D4 generators perfectly suited for all kinds of critical assignments, even with
Combining flash tubes and/or glass covers with different coatings can make distinctive colour temperature adjustments if needed.
f-stop Stability
Profoto’s “Hybrid Flash Technology” offers constant power output from flash to flash; this ensures stable and repeatable results – essential when D4’s are used in combination with Multi Shot backs. In fact, the power stability of D4 generators is better than the repeat accuracy of flash meters.
Flash Duration
The flash duration can be shortened by reducing the power output with the Power Dials [13]. The shortest flash duration using a AcuteHead and a D4 1200 generator at lowest energy is1/7500 sec. To shorten the flash duration at a given setting, use an AcuteTwin head.
In example: If you connect the two plugs of an AcuteTwin to the Lamp Head Sockets A and B [9] of a D4 1200 generator and use both outlets at 600Ws, the flash duration is just 1/1600s. instead of 1/1000s. at max. power with one AcuteHead.
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PLEASE NOTE! Voltage peaks of
Profoto | 30 | The Light Shaping Company | The Light Shaping Company | 31 | Profoto |
