Acute/D4 Head, Acute/D4 Twin | Profoto specification

D4 Profoto D4 – Acute/D4 Heads

Acute/D4 Head

All Profoto lamp heads are designed for maximum light shaping ability.The reflectors lock easily into place and by sliding the reflector different types of light shapes are achieved. All Profoto reflectors and accessories fit the Acute/D4 Heads. The flash head has a built in holder for the umbrella. A UV-reduced quartz flash tube is included with all Acute/D4 Heads. The flash tube has two metal pins. When removing a flash tube, pull it straight out of the sockets. When inserting a new flash tube, check that the trigger wire clasps properly around the flash tube (please see mounting instructions in package). Always use original Acute/D4 flash tubes, other flash tubes can create serious malfunctions. In case the head overheats the modelling light automatically switches off. When the temperature has dropped suffi- ciently the modelling light will switch on again.The Acute/D4 Head is fan cooled and it has an automatic voltage selector for the fan.

WARNING! The proportional modelling light is powered directly from the mains and it is therefore important to check that the rated voltage for the lamp corresponds with the mains supply before connecting a head with the generator. A switch at the back of the head allows turning off the modelling light.

PLEASE NOTE! Always unplug the lamp cable from the generator before changing modelling lamp, glass cover or flash tube. A 250W E11 Mini-Can halogen lamp is included, but the head is also available with a 500W lamp.

The Acute/D4 Head is supplied with a frosted UV-coated glass cover and a Standard Zoom reflector. Combined with the UV-reducing quartz flash tube the frosted glass cover offers the recommended colour temperature for daylight type film. Distinctive colour temperature adjustments can be obtained by combining glass covers with different coatings.

The following glass covers are available:

For 250W modelling lamp

10 15 33 Glass Cover, frosted, UV-coated (standard)

10 15 34 Glass Cover, frosted, uncoated (+300°K)

10 15 35 Glass Cover, frosted, extra UV-coated (-300°K) 10 15 36 Glass Cover, clear, uncoated (-300°K)

10 15 37 Glass Cover, clear, UV-coated

10 20 02 250W, 120V Halogen, Mini-Can

10 20 13 250W, 240V Halogen, Mini-Can

For 500W modelling lamp (long version)

10 15 18 Glass Cover, frosted, UV-coated (standard)

10 15 19 Glass Cover, frosted, extra UV-coated (-300°K) 10 15 20 Glass Cover, frosted, uncoated (+300°K)

10 15 21 Glass Cover, clear, UV-coated

10 15 23 Glass Cover, clear, uncoated (+300°K)

10 20 07 500W, 120V Halogen, Mini-Can

10 20 15 500W, 240V Halogen, Min-Can

Profoto D4 – Acute/D4 Heads D4

Acute/D4 Twin

The Acute/D4 Twin offers even shorter flash duration,very quick recycling or the ability to obtain 4800 Ws out of one single head. An Acute/D4 Twin has two flash tubes. As the flash duration is shorter at low power settings, and as only half of the desired power is used in each tube, consequently shorter flash duration is obtained. If you require shorter flash duration and for example need 1200 Ws, you connect the Acute/D4 Twin to the A and B sockets on the D4 1200 generator and fire 600 Ws from each tube. The flash duration is shorter than if a standard Acute/D4 Head is used.The flash duration at 1200 Ws with an Acute/D4 Head is 1/1000 sec. while it is only 1/1600 sec. with an Acute/D4 Twin. If, on the contrary, you require faster recycling, you power one Acute/D4 Twin with two D4 genera- tors. The recycling is faster since each generator needs to recharge less of it’s energy.To get 4800 Ws from one head you connect the Acute/D4 Twin to two D4 2400 generators.

WARNING!The proportional modelling light is powered directly from the mains and it is therefore important to check that the rated voltage for the lamp corresponds with the mains supply before connecting a head with the generator. A switch at the back of the head allows turning off the modelling light.

PLEASE NOTE! Always unplug the lamp cable from the generator before changing modelling lamp, glass cover or flash tube.The modelling light is a 500W Halogen with a Mini-Can socket (E11). The flash tube has two metal pins. When removing a flash tube, pull it straight out of the sockets. When inserting a new flash tube, check that the trigger wire clasps properly around the flash tube (please see mounting instructions in package). Always use original Acute/D4 Twin flash tubes, other flash tubes can create serious malfunctions.

The Acute/D4 Twin is supplied with a frosted UV-coated glass cover and a Magnum reflector. Combined with the UV-reducing quartz flash tube the frosted glass cover offers the recom- mended colour temperature for daylight type film. Distinctive colour temperature adjust- ments can be obtained by combining glass covers with different coatings.