American Cinematographer - May 1990 - 10
The Clairmont
Strobe:
Inexpensive, compact, lightweight,
flexible. Easy to use,
needs no special operator. Runs on
110V. Syncs automatically
at any speed with our BLs, Type 3s,
16SRs, Frieses, Mark IIs.
For a reallysharp image
of a moving subject, you
need a short exposure time.
Automatic sync
to camera shutter
fps in normal light,
your exposure is about 1/50
second, of course. With
The slowest Strobe rate is one
flash sequence every sixteen
frames. The fastest is the
maximum speed of our cam¬
the Clairmont Strobe, it's
eras-125 flash sequences
1/50,000 second.
per
At 24
1/50,000 second
The "standard" firing rate
for the Strobe is one flash
sequence per frame. That's
two flashes-one for the film
while the shutter is open, one
for the viewfinder while the
shutter is closed.
The
Sequencer
For exotic TV spot effects,
we've built the Clairmont
Strobe Sequencer. It lets you
select frames, so the Strobe
Exposure is
fires (or doesn't) in a regular
(or irregular) pattern.
the same, even if
you change
Nine channel
speed during shot
No matter what your camera
speed, the Strobe exposure is
the same. You can change
speed during a shot-no need
change the iris. Flash
duration is always 1/50,000th.
to
second. Automatically
synced by the camera's
electronic shutter pulse.
Clairmont strobe heads
versatility
The Sequencer (see photo)
are
both
lightweight and
compact. Small size lets you position them pre¬
cisely and move in close for big-source effect.
has nine channels. Each
Heads can be mounted horizontally or vertically.
channel has twenty-four tiny
rocker switches. Each switch
controls one frame. You can
frame fires the Strobe head
Seeing each
set the switches so every
drop of water
(or heads) plugged into that
At 1/50,000 second and 120
channel.
Strobe
dimming!
Or you can set the switches
so only frames 6,12,18 and
24 fire. Or only frames 1,3,5
and 7. Or any other sequence
you like-a strobe dimming
effect, for example. For each
of the nine channels, the
sequence can be different.
Multiple heads
New
Sequencer
lets you select (from 24) the exact frame on
which the strobe fires. Nine separate chan¬
nels, so you can fire multiple heads on differ¬
ent frames for exotic effects.
Since our Strobes can be
connected in series, you can
run
several heads from each
of the nine channels. The
Sequencer works at any
speed up to 125 fps.
fps, you can easily see the
individual water pulses from
a pulsating shower head. At
120 fps with regular lighting,
the water would be hopelessly
blurred. At 1,000 fps, the
pulses would be sharp. But
the action would be so slowed
down that it would lose
its
reality.
Strobe and
speed:
thing
not the same
The important point is this:
strobe lighting is for super
sharpness; ultra high speed
They're
is for slow motion.
not the same.
American Cinematographer - May 1990
Table of Contents for the Digital Edition of American Cinematographer - May 1990
American Cinematographer - May 1990 - 1
American Cinematographer - May 1990 - 2
American Cinematographer - May 1990 - 3
American Cinematographer - May 1990 - 4
American Cinematographer - May 1990 - 5
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