The Profoto Acute/D4 Ring Flash Head is soft light source that encircles the lens and supports the camera via the included mount. The head is compatible with Acute and D4 power packs.

Popular with fashion photographers, the Acute/D4 Ring is renowned for its unique catchlights, soft, flat output, nearly shadowless quality of light at a distance and haloed shadows when close to a background. The head employs a safety glass cover for its ozone-free quartz UV-coated flash tube which has a capacity of 2,400W/s and 9,600W/s per minute of continuous firing.

The Acute/D4 Ring ships with a glass safety cover and a 13' power cable. Optional accessories include Softlight, Close-up and WideSoft Reflectors.

Type     Circular flash tube with protective glass

Compatibility    Acute and D4 generators

Capacity      2400W/s , Up to 9,600W/s per minute

Light Intensity Output

• At 2,400W/s at 6.6' (2.0 m) @ ISO 100:
• f/32.6 without reflector
• f/22 with optional diffuser
• f/45.4 with optional Pro Ring Softlight Reflector
• f/45 with optional Pro Ring Close-Up Reflector
• f/22.1 with optional Pro Ring WideSoft Reflector
   

Fan      No

Fuse    3.15 AT

User Replaceable Flashtube     No

Changeable Reflector      Optional reflectors available

Cable Length       13' (4.0 m)

Modeling Light Wattage         No modeling lamp

DimensionsInterior diameter:

• 4.0" (10 cm)
• Exterior diameter: 8.6" (22 cm)
• Overall: 7.75 x 8.25 x 9.0" (20 x 21 x 23 cm)

Weight           4.85 lb (2.2 kg) including camera mount

• Can be stand mounted or have camera mounted to it
• Creates a direct light without harshness
• Signature catchlights
• Very safe to use thanks to the reduced UV flash tube and arc-proof connector
• Compatible with a number of dedicated light shaping tools
• Compatible With Acute and D4 Packs
• Optional Reflectors
• 4.0" Internal Diameter
• Camera and Stand Mount
• Soft, Shadowless Light
• Signature Catchlights

• Camera Adapter
• Stand Adapter
• Protective Glass Cover
• Heavy Duty Lead Lamp Cable (13')