American Cinematographer - December 1970 - 31

(LEFT) Lens receptacle on the camera is of the conventional Arriflex type and will accept all standard steel, bayonet-mounted lenses, as well as the
older style, non-bayonet "ARRI-mounts". (RIGHT) With the new double pull-down film movement system, a maximum framing rate of
approximately 90 fps is attained, with forward or reverse travel. Small mass forces in the claw parts reduce camera vibration to a minimum.

gear-driven mechanism holds a constant
sprocket-fed film loop and provides
positive take-up. The camera is present¬
ly equipped with a 400-foot magazine,
but a 1000-foot magazine is in prepara¬
tion.
Camera and magazine mechanisms
are mounted on rubber, which acousti¬
cally insulates them from their housings.
The noise level of the camera with lens
blimp is approx. 33 to 35 dB, depending
on lens type. Without the lens blimp,
the noise level is approx. 39 dB.
Camera Drive and Gear Train
Film movement, mirror-reflex shut¬
ter and magazine are driven by a printed
motor which is directly coupled to the
movement main shaft. This motor fea¬
tures high electrical efficiency.
An automatic safety switch protects
the motor from overload. With this
camera model, the transverse double¬
blade mirror-reflex shutter has an open
sector of 180°. An automatic shutter
inching device controlled by the motor
electronics always brings the shutter in

viewing position. In addition, manual
shutter inching is also possible.
Also driven by the transport mechan¬
ism are: the Pilotone generator, switchable from 24 fps to 25 fps (for a pilot
frequency of 50 Hz or 60 Hz in the
U.S.A.); the tachometer and the clearly
visible "feet" or "meter" counter.
Film Movement and Film Guide (DBP)
With the new double pull-down film
movement system, a maximum framing

rate of approx. 90 fps is attained with
forward or reverse travel. Small mass
forces in the claw parts reduce camera
vibrations to a minimum. The dual
registration pins guarantee optimum
frame steadiness. Film guidance and
registration are accomplished by the
registration pins alone, so that no spe¬
cial side guides and pressure gates are
necessary. The spacer gate prevents
"breathing". The obtained steadiness of
Continued on Page 1228

TECHNICAL CHARACTERISTICS OF THE ARRIFLEX 35 BL CAMERA
FILM WIDTH:
FRAMING RATE:
NOISE LEVEL OF THE CAMERA WITHOUT LENS
BLIMP, MEASURED 3 FT IN FRONT OF THE LENS
MAGAZINE CAPACITY
LENS RECEPTACLE
LOAD REQUIREMENT OF THE CAMERA
AT 25 FPS-90 FPS
OPEN SEGMENT OF THE ROTARY SHUTTER
DIMENSIONS

WEIGHT OF OPERATIVE CAMERA
TRIPOD THREAD

35mm
24 to approx. 90 fps
approx. 39 dB
400 ft (1000 ft magazine in preparation)
ARRIFLEX mount
approx. 25 W-125 W
180°
Length 19%"
Width 10%"
Height 9"
approx. 20 lbs 8 ozs
3/8". Also for use with wedge plate

(LEFT) Cinemobile Systems President (and former "I SPY" foreign location Director of Photography) Fouad Said, tries the new Arri 35 BL on for
size at Photokina. (RIGHT) The camera's compact configuration end weight-centered coaxial magazine enable it to balance comfortably and
securely on the shoulder with no need for a body-brace. Carrying handle on top, designed to serve simultaneously as a matte box rod-holder, makes
the camera readily transportable.

American Cinematographer - December 1970

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