Mode Selector Dial; Remote Control Socket; Double Exposure - Hasselblad 553 ELX Instruction Manual

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Mode Selector Dial
The selector dial offers five release modes forthe
camera.
O-NORMAL MODE. Exposure occurs when the
release plate is depressed. The film is advanced,
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the shutter cocked and the mirror returned to
viewing position
when the presure on the release
plate is removed,
S - PRE-RELEASE. When the dial is moved to
this position the lens shutter is closed, the dia-
phragm stops down to the pre-selected aperture,
the mirror swings up and the auxiliary shutter
'opens. Oniy the actual operation of the shutter
remains when the release plate is pressed. Since
most of the camera operations are pre-released,
the camera's reaction time between release and
exposure is reduced to a minimum, as is camera
induced vibration. The selector dial is not re-
tained in the S-position but returns to the O-
position when released.
RS- The camera is pro-released when the mode
selector is moved to RS where itis held, and con-
tinues to pre-release after each exposure until
the mode selector is returned manually to the O
or A position.
A— Automatic. The camera makes a continuous
sequence of exposures as long as the triggering
impulse is applied, and unexposed film remains
in the camera. The sequential exposure rate in
this mode is about 1 frame/sec.
AS — The camera is pre-released in AS and
exposes sequentially as long as the exposure
button is kept depressed, At the end of the
sequence the
camera
remains in a pre-eleased
state. The exposure rate is slightly faster than in
the A position.
Remote Control Socket
At the rear of the motor housing on the right hand
side is a 5-pole DIN-socket. You can use this to
operate the camera by means of the release
cords (SK and LK), a timer or any means that
closes the circuit between pins 1 and 3 (see page
38, Circuit Diagram). The external resistance
should not exceed 6 ohms and the circuit should
remain closed at least O.1sec for reliable
triggering.
Double Exposure
The camera has been designed to prevent acci-
dental double exposure. Intentional double and
multiple exposures on the same frame can be
carried out as follows:
1. Depress the release plate and keep it da-
pressed. The magazine status indicator now
shifts to red.
2, Move the LOT lever to the L position andrelax
the pressure on the release plate.
3. Insert the magazine slide and remove the
magazine from the camera.
4, Return the lever to the O position. The cam-
era will wind on.
5, Replace the magazine and remove the slide.
The unitis now ready to make asecond exposure
on the same frame even though the magazine
indicator is red. You can make additional expo-
sures in the sama manner.
The magazine status indicator remains red until
the magazine is left on the camera and wound
on.
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