ECLAIR ACL, Руководство по эксплуатации

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• 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
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