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F
FLY BARS
The metal bars to which scenery and lanterns are attached for flying above
the stage.
FLYING PIG SYSTEMS
Makers of the Wholehog / Hog range of lighting control desks.
FOCUS
1) The session when all the lanterns in the rig are angled in the correct
direction, with the correct beam size. 2) Description of how sharply defined
a light beam is ("give that profile a sharp focus") 3) Control on projection
equipment used to change the focus.
FOCUS CHART
Documentation produced by the lighting designer which shows graphically the
exact focus of a particular lantern in the rig. Essential for long-running
shows where the crew can use it as a reference when replacing lanterns or
checking focus after cleaning etc. The charts can also be used to do a
"rough" focus before a lighting designer arrives at the venue. Touring shows
sometimes use a floorcloth marked out with focus information to aid speedy
focussing in a new venue.
FOCUS POINT
Function on some computerized lighting desks which allows the operator to
specify a place on the stage to which moving lights can be made to move on
cue. Once defined, the focus point can easily be recalled and used in
multiple cues. If the location of that item is moved (e.g. the chair is
moved to the right) all moving lights will automatically focus on the new
location.
FOCUS SPOT
Term for both Fresnel and PC type lanterns with adjustable beam size.
FOCUSING
The process of adjusting the direction and beam size of lanterns. Does not
necessarily result in a "sharply focused" image.
FOLLOW-ON CUE / FOLLOW CUE
A cue that happens so soon after a previous cue, that it doesn't need to be
cued separately. The follow-on can be taken by the operator once a previous
cue is complete, or a lighting or sound cue can be programmed to happen a
specific time after a previous cue. Fly follow-on cues are often taken as
soon as the operator has completed a previous cue. Often abbreviated to F/O.
FOLLOWSPOT / FOLLOW SPOT
Usually, a powerful profile lantern usually fitted with its own dimmer,
iris, color magazine and shutters mounted in or above the auditorium, used
with an operator so that the light beam can be moved around the stage to
follow an actor. Sometimes a beam light or other lantern may be used in the
same way.
Powerful followspots use discharge lamps which cannot be dimmed, so these
followspots have mechanical dimming shutters to dim the light output.
FOOT
1) The action of bracing the bottom of a ladder while a colleague climbs it
(e.g. "Can you foot this for me please? I'll only be a couple of minutes").
2) Holding the bottom edge of a flat with your foot while a colleague raises
the top of it to a vertical position.
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