K5600 Alpha HMI Fresnel 2.5/4kW Head Kit

• Lamp Housing without Bulb (purple grey & silver color)
• 4-leaf Rotatable Barndoor with Safety Wire
• Ø450mm (17-3/4 in.) Fresnel Lens
• Inlet Cable with Multi-Pin Connector
• Stirrup with Ø28mm (1-1/8 in.) Spigot

# Requires Electronic Ballast, Lamphead to Ballast Cable and Lamp Bulb

A member of the ARRI M-Series, the M40 is a lens-less system that unifies the advantages of Fresnel and PAR fixtures. The unit is open face and thus very bright: around 30 % brighter than an AS40 in spot. Due to its unique, patented MAX Technology reflector, it is also focussable over a range of 18 to 52° Half Peak Angle. The M40 gives a remarkably even beam spread that casts crisp shadows over the whole focus range. The reflector characteristics is optimised for 4,000 W lamps, but can also be used with 2,500 W lamps.

The lamphead is equipped with a CCL module (Compensation of Cable Losses). When operated with the ARRI EB 2.5/4 kW High Speed AutoScan with CCL, full power is maintained all the way to the lamp even when very long cables are used. This means uniformly high light output indepent from cable length.

Weighing only 125 lbs and having a small shallow profile of merely 23”, the Alpha 18K can use a Ceramic glass lens or Standard 24” Fresnel to create the smallest, lightest and most versatile 18K ever designed.

At the core of this innovation is a custom made reflector molded out of quartz composite material. This allows the lamp to be placed much closer to the reflector, therefore reducing the physical size of the Alpha 18K by a third compared traditional 18K’s on the market. The light output from this new reflector increases output by nearly 15%, adding a softer and smoother lighting pattern compared to the oversized conventional aluminum reflector.

The extrusion/vent system is precisely angled to get maximum cooling efficiency , the small diameter reflector allows for better heat circulation, along with a new back bulkhead, which assures that the Alpha 18K operating temperatures remain within specifications in any critical position, including straight down.

A double suspension system (one to the lamp heat sinks and one to the chassis support) makes the Alpha 18K lamp less fragile to rough handling, occurring during location transportation.

Whether it’s creating a soft Fresnel look or a hard shadow using the open eye set-up, the Alpha 18K gives any cinematographer or lighting director the tool he needs to get the job done.