ECLAIR ACL Manuale utente

SOREMEC - CEHESS

Department “ECLAIR INTERNATIONAL”

41-45, rue Galilee - 75116 Paris

Tel: 723.78.56 +

Telex: 610 663 F ECLAIRE

Cable: ECLAIRCAM PARIS

Technical Characteristics

Weight:

4.3 kg without lens

Overall dimensions:

275 x 180 x 160 mm, without lens (11" x 7" x

6" 1/2)

Capacity:

pre-loaded 60 meter (200ft) or 120 m (400ft)

snap-on magazine

16mm film:

• double or single perforation

• A winding (emulsion out)

• B winding (emulsion in)

• on 50 mm (2 in) core-120 meter rolls

• on 30 or 60 m (100 or 200 ft) daylight load-

ing spools

Climatic conditions:

Temperature - 20° C (4° F) to + 60° C (140°

Humidity: up to 95% RH

Film Transport:

claw movement controlled by an excentric

and a fixed cam.

Reflex veiwing:

by a half-speed oscillating mirror.

Shutter:

plane type with a 175° opening.

Viewfinder:

for left and/or right eye, rotatabhle through

360° with image re-erected, dioptry adjust-

ment

and eyepiece shutter.

Gelatine holder:

built-in and positioned between the C mount

and the reflex mirror.

Lens Mounts:

in C mount, screwed directly on the camera,

in Cameflex, Arriflex or Nikon mounts,

adapted to the camera by means of interme-

diate

mount.

Exposure indicator:

by 7 LED (light emmitting diodes) in vertical

display seen in the viewfinder.

Motor:

12 volts multiduty type, brushless, Hall effect,

6 crystal controlled speeds 8, 12, 24, 25

50, 75 frames per second. Automatic stop

in viewing position.

Power consumption:

from 0.8 to 1.2 Amps at 12 volts (20 C to 68° F)

Batteries:

12 volts MIBAC type: weight 0.640 gr (1.5 lbs)

(capacity 1.2 ah); rechargeable in less than

30 minutes equivalent to eight to ten 60 m

magazines or 12 volts BAKEL type:

weight 1.650 kg, capacity 4 ah equivalent

to ten to fifteen magazines

Noise level:

Quiet functioning that permits sync, filming

without any blimp.

Flat base:

standard 3/8"x16 threads per inch taping

for using a tripod or a polo stick.

Hand-grip:

adjustable lateral type with "ON/OFF"

micro-switch.

Standard screw:

on top of the camera for attachment

of accessories such as handle, boost lighting

mike support, etc.

DESCRIPTION

THE CAMERA HEAD (Code MIPEX)

The camera head (Fig A) in special

aluminum alloy supports the lens mounts (1)

in stainless steel, the interchangeable ge-

latine-holder (2), the reflex viewfinder (3), the

motor (6) with its control for electronics (7),

the electronic base (8) incorporating the

sliding on/off switch (32), the lateral support

(75) of the hand-grip (36) with its micro-switch

(76), the magazine lock release lever (16)

with its safery catch (17) and the removable

hand-grip (36).

On the rear (Fig B): the mechanism

plate (9) on which are mounted film gate (10),

the fixed guide bar (11) and its side pressure bar

(12), the magazine drive shaft (18), the 4 pin

power supply socket (19) for connection with the

battery, the clapper switch (20) and the potenti-

ometer (34) of the exposure indicator.

Inside: the claw mechanism (13), the

oscillating mirror (14), the plane shutter (15) and

the exposure indicator unit.

The snap-on 60m, or 120m magazine

are attached onto the camera head as well as

the fixed focal or zoom lenses.

NOTA. The above camera head can be sup-

plied without Exposure indicator unit; its

commercial code is MITAN.

Fig. A

Camera head front view.

Viewfinder positioned

for the left eye.

Fig. B

Camera head rear view.

Viewfinder positioned

for the right eye.

29 30

THE MULTIDUTY MOTOR (MIVAR)

This brushiess motor (6) has a very

high efficiency (from 0.8 to 1.2 amp. con-

sumption at 12 volts to drive the camera at

20°C (68° F) and has permitted a weight

reduction not only in the camera but also in

the battery (37) - page 12 - which weighs only

640 grammes enabling one hour of filming

between recharges, i.e. eight to ten 60 m

magazines.

The incorporated electronics (7)

control the sync. speed by crystal ; changing

from 24 to 25 f.p.s. or vice-versa is made by

shifting switch (38) so that the white spot

mark is adjacent to the desired speed. Others

speeds : 8.12.50 and 75 are obtained by

setting the engraved button 35 accordingly.

The MIVAR will stop the camera

automatically in viewing position,

i.e. the mirror being in the aperture axis

allows the cameraman to frame and focus

without

loss of time. See pages 24 and 30.

The motor will only operate when it is

attached to the camera.

The lamp (47) on the motor lights up

until the marked speed is attained. In the

event of speed reduction (flat battery for

647 38 35 7

Fig. D. - Front part of the MIVAR.

Fig. E. - Rear part of the MIVAR.

738 35 47 6

THE 60 m MAGAZI N E

The two chambers of this snap-on co-

axial magazine are separated by a median

partition and are connected by a light tight

ramp for the passage of the film from the feed

side to the take-up side (Fig F).

THE 120 m MAGAZINE

Bearing in mind the versatility and light

weight of the 60 m magazine which can be

changed almost instantaneously, there are

occasions where a « long take » in excess of

60 m is required and for this purpose a 120 m

capacity magazine is available.

This co-axial magazine retains all the

characteristics of simple threading and snap-

on action for which the Eclair equipment is

famous.

Fig. F

Fig. H

Fig. G

Fig. I

THE HAND-GRIP

The portability of the ACL is increased by

the use of the hand-grip (36) supplied with the

camera.

Adjustable in the horizontal and the

vertical plane, it permits the choice of the most

confortable position. It can be screwed either

under the camera base or on the right hand side

of the camera (fig K).

To carry the camera, the hand-grip (36)

with its knurled knob (79) - fig. QR - can also be

screwed on top of the camera head.

MOUNTS AND LENSES

The ACL has been designed to accept

« C » mount lenses (fig Q, the mechanical back

focal distance of which are 17.52 mm, and also

other professional mounts such as Eclair CA (fig

M) Arriflex, Nikon, etc... the mechanical back

focal distances of which are greater than 17.52

mm.

Fig. K

Fig. J

Fig. L Fig. M Fig. N

Lens in C mount Lens in CA Eclair mount Intermediate mount

Ca mechanical back focal distance

C mechanical back focal distance

Film plane

17.52 mm

48 mm

The mechanical back focal distances

(fig N) being different according to the profes-

sional equipment manufacturers 48 mm for

ECLAIR (Eclair CA), 52 mm for

Arriflex, 46 mm for Nikon, corresponding

intermediate Eclair TS mounts (Fig P-P’-P”-)

can be supplied for these different makes of

lenses for use with the ACL camera. For Arrif

lex, specify « normal mount » or « new steel

bayonet mount ».

Hence, the ACL lens support (1)

comprises an internal threading (21) the

diameter and the thread pitch or which corre-

spond to the C lenses standards and an

external threading (22) for the Eclair TS

mounts (Fig P-P’-P”); the orientation of the

lens is ensured by the slot (23) at tfie top of

the flange.

ACCESSORIES

The principal additional accessories of an

“ACL” equipment are :

• The 12 volts battery type VR 1,2

• The connection

cable camera/battery VR 1,2 .............

• The rapid charger ...............................

• 12 volts battery type VR 4 ..................

• The connection

cable Camera battery VR 4 ...............

• The compact charger .........................

• The connection

cable Charger/battery ........................

• The pilotone module ...........................

• The connection

cable Module/recorder

(according to the make of the recorder)

• The transport case ..............................

Code MIBAC

MIBLE

MIRAP

BAKEL

BABAC

CIBRE

COURE

MODUL

MALAC

Fig. O

Fig. P

Intermediate mount

for lenses in CA mount

Fig. P’

Intermediate mount

for lenses in Arriflex mount

Fig. P’’

Intermediate mount

for lenses in Nikon mount

• Its position, away from the fi I m plane en-

sures any small dust or finger marks on the

gelatine that may occur are out of focus on the

final result and rarely visible.

Shutter

Contrary to reflex cameras in which the

mirror mounted at 45' acts as a shutter, the

ACL has a plane shutter of large diameter

completely independant of the mirror (14). It is

placed very close to the film plane with an

opening of 175'. Cutting the image in the

direction of the smallest dimension gives a

perfect exposure, maximum definition and

reduction of jerky effect on some panning

shots. The exposure time is 1 /51 of a second

at 25 frames per second and 1 / 49 of a sec-

ond at 24 frames per second (page 33).

GENERAL INFORMATION

REFLEX SIGHT

The reflex image is obtained with an

oscillating mirror (14) moving at half camera

speed, which transmits the image formed by

the lens onto the ground glass during the

descent of the film.

The viewf inder (focussing tube) is a

new mechanical /optical realization which

gives an exceptionally bright image.

As on the Eclair 16, the ground glass

gives a field of view greater than the recorded

image, which eliminates the possible intrusion

of microphones, etc... into the recorded

picture. (Fig Q).

This viewfinder - 10 x enlargement -

can be used for left eye or right eye viewing it

can pivot through 360' parallel to the camera

thus allowing the cameraman to frame and to

focus in the most comfortable conditions

whatever the position of the camera; for

example, he can shoot with his back facing

the subject. The eyepiece is adjustable of ±

5dioptres.

The standard ground glass is en-

graved with the 16 mm frame (10,2

x 7,4 mm), the TV frame and a cross in the

centre (UER standard).

Gelatine filter holder

Each ACL is equipped with a gelatine

holder 2 (Fig A and R) which is located between

the C mount and the reflex mirror close to the

rear element of the taking lens. Its advantages

are :

• It is not necessary to change filter at each lens

change.

• It is possible to check the presence and type of

gelatine through the viewf inder.

• It eliminates the requirement for front glass

filters for each lens diameter, the price of which

is very high compared to that of gelatine filters

which are readily obtainable.

Fig. R

Fig. Q

27 2

Mechanism

The complete silent mechanism is

mounted on the mechanism plate which

greatly reduces the time required for the

normal overhaul and cleaning which we

would strongly recommend to be carried out

by one of our agents.

The claw movement (13) is controlled

by an excentric and a fixed cam (39), the

security is ensured by a counter-cam.

The four drive shafts run in self-

lubrificated bearings and the camera mecha-

nism should NEVER be oiled.

As already indicated page (4), the

aperture plate of hard chromium-plated steel

has, on the left, a fixed guide (11) which is the

edge reference for the film and a spring

loaded guide (12) on the right, which main-

tains the film against the fixed guide.

The two guides (29-30) fig B position

the magazine nose onto the mechanism

plate.

adjusting the diaphragm if he needs a special

effect by under or over exposure, e.g. contrast.

Before filming, the operator sets the

exposure indicator with the aid of his profes-

sional photo- cell exposure meter indicating the

diaphragm opening (stop) of the lens; it gives

him a reference lighting intensity « EO ». The

camera being connected to the battery, he

adjusts the sensitivity potentiometer (34) so that

only the middle diode EO, visible in the

viewfinder, lights up. Thus the camera is now

matched to the exposure meter.

During filming, if the lighting intensity of

the subject varies, the control diodes visible in

the viewf inder will be seen light up either + or -

. The operator wiII then correct the diaphragm

of his lens so as to maintain the lighting inten-

sity on the film to a value of EO, if he deems it

necessary.

Fig. S

Exposure indicator

The ACL camera had to have a very

safe « Exposure Indicator device » because

of the professional work it must ensure. It

could not be question of an ordinary photo-

cell system due to the fragility of moving

parts; on the other hand, a 100% automatic

device leaves the cameraman no change of

artistic creation.

The basic idea is to leave the camera-

man freedom to determine the exposure of

the film and thus give him the possiblility of

working according to his own technique; in

other words he must have the possibility of

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