User Manual
The lighting levels depend very much on the sensitivity of video camera you are using, however as a general rule you
should be trying to light to between 500 and 1000 lux. This is typical of a 650w fresnel lamp flooded at approx 5m
(16ft) from the subject.
The use of a steep back light behind the subject illuminating the head and shoulders is also recommended. This light
can be placed anywhere behind and above the subject but is normally placed on the same side as the key light to
add both direction and separation to the key.
You should not illuminate the Chromatte, however ambient spill onto the Chromatte will not be a problem at all. Do
not place a key light directly above or on axis to the camera as the light from this lamp could dilute the effect of the
Chromatte by creating a hot spot.
As far as subject to background distances are concerned, you can place your subject close to the Chromatte curtain if
you wish, you do not need to leave the separation from subject to background you would normally require with
traditional blue screen, however you may wish to leave a small gap (approx 1m/3-4ft) to accommodate the back light.
The distance from camera to subject will depend on the framing of the shot and the type of lens on the camera but
typically a distance of about 3 to 5 meters would be normal. At greater distances you will have to increase the
LiteRing power or iris the camera open to compensate for the distances involved. The use of two backlights is
optional however two, do allow more control.
1. Set your lights to illuminate your subject. (You camera should iris at approx f2.8 to f4, any higher than this
and you may be using to much light).
2. Switch the LiteRings on and set them initially to 0 in the Controller.
3. Select the colour you wish to key out on your chromakeyer. You may have to adjust the key strength to illuminate
all of the blue or green.
4. Adjust the LiteRing slightly to compensate for errors.
5. Repeat the last two processes until you have satisfactory results.