The effect itself is created by rotating two B-size glass gobos off centre of the optical path. This results in a projection that does not appear to have a visible direction or pattern. Onboard potentiometers control the speed and direction of both gobos, and the colour slot will accept dichroic colour filters. Lens trains are available in 30, 50 and 70° configurations. Due to the efficiency of the lamp and the design of the optics, all lenses have crisp edges, even for long throws of 100ft or more.
Also debuting at ABTT, Rosco's Model 1900 fog machine is a high output, affordable, professional fog machine, designed for any environments requiring a large amount of fog - including theatrical productions, clubs, opera, film and TV. Built on the same principles as the Model 1700, the Model 1900 offers control features including volume control to allow the user to vary the output, as well as on/off timers for automatic sequencing. Up to four Model 1900 machines can be operated from a single remote by simply running a standard 3-pin XLR cable from machine to machine - a popular feature in clubs or other large spaces.
The remote control, standard with the Model 1900, is stored on the machine and comes with a 5m cable. An optional DMX control is available so that the 1900 can be easily operated from a lighting control console. The Model 1900 accepts the same standard hose adaptor and ducting hose as all other Rosco machines.
Regarding its high output, Rosco say it can produce an initial burst of fog in the first minute that is 250% higher than the Model 1700: after the initial burst, the Model 1900 will scale back the fog to operate continuously without interruption for a reheat cycle. This fog volume is achieved using only 20% more power than the Model 1700, say Rosco.
(Lee Baldock)
