American Cinematographer - August 1983 - 111

something like a TK-29."
"There

other

problems.
f-stop is rather high so they have
a limited light transmitting capability.
The f-stop is probably somewhere
around f-4 or f-5. They're also sus¬
ceptible to dirt. If there's any dirt
whatsoever on the film, it is likely that
are

some

The

it will

come

off

on one

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on

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Adjustable seat and camera heights
Safety belt secured seating for two

of the faces of

IMAGE DEVICES

the

prism. Every time the prism ro¬
tates, you'll see the same spot reap¬
pear in the same place on the picture.
If you had the thing in a clean room
an

ultrasonic cleaner each

time you ran
OK.''

film, you'd probably be

and used

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"The transition between frames is

lap dissolve. You have two frames
there during a lap, so with the ro¬
tating prism, two film frames are
being mixed rather than two televi¬
sion fields (as with the projection tele¬
cine). This might cause a bit of
bluriness, but not much jitter.''
"Each system is intended to do a
specific type of job," says Joe Bluth,
who feels that it might be rather point¬
less to compare the projection and rotating-prism telecines. "I have always
looked at the rotating prism as a sys¬
tem to be used for making reference
copies. It's lower in cost than the
other devices and the quality seems
a

to be lower. This is

determined to

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FOR STANDARDS CONVERSION

(or anything else)
do 1" editing.
have great prices.
make PAL copies of your tapes.

You know

Now

we can

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great extent by the type of camera
used in the rotating prism machine.
As far as I can tell, it makes good
quality reference copies. I just can't
see that it would be used on an equal
footing with the flying spot, CCD or
projection telecines. The transfer cop¬
ies you get from the rotating prism
aren't

the other

Presents the
that
with

How does the

horizontal range

of eighteen feet

vertical range

of six feet.

GET DOWN and

glide within

one

and

one

quarter inches
of the deck!

FLOAT
and
pa'ib'p

with

T'-Tv,*,

FLYING SPOT

vs.

only five axis fluid crane

gives you a free floating camera
and

good as those you get from
systems."

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projection telecine

compare with its newer competitor?
Dave Schnuelle says it's a close race,
but one system seems to have the

For information write

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1646 20th Street Santa Monica, California 90404

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edge:
"The flying spot is generally ac¬
knowledged to have better resolution,
signal-to-noise ratio and colorimetry
than the projection telecine. For
transfer work, the flying spot seems
to be the best, but for broadcasting
direct from TV stations, the projection
telecine is preferred. This is because
the projection telecine technology is
the same as the cameras used at the
TV station.

They are also easier to

complicated than
flying spot machines. The flying
spot units I've worked with have been

maintain and less
the

very, very

reliable. They require far

AMERICAN CINEMATOGRAPHER,

AUGUST, 1983

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109

American Cinematographer - August 1983

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