Hasselblad 503CW User Manual page 74

Double exposure with film
Double (or multiple) exposure is possible with a film magazine. However, as the camera
has been designed to prevent accidental double exposure you will have to carry out the
following procedure in order to make multiple exposures on the same frame:
1. Make the initial exposure.
2. 1nsert the magazine slide and remove the magazine.
3. Wind the camera with one full revolution of the winding crank.
4. Replace the magazine and remove the slide.
5. Make the next exposure .
6. Repeat the procedurefor further exposures on the same frame.
Flash/strobe with film
Any flash/strobe unit can be connected to the 503 CW / 503 CWD via the PC flash/strobe
terminal on the lens for manually controlled flash exposure with flash sync speeds are up
to 1/500s.
Automatic flash control, or dedicated flash, is provided by the camera's built-in flash sensor
and electronics (TTL/OTF) that measure the light reflected from the central portion of the
film; a circle with a diameter of 40 mm.
The metering system is connected to a selector for setting film speed. When an SCA 300
compatible flash/strobe unit is connected through an SCA390 flash/strobe adaptor, the
system controls the flash/strobe unit and cuts off the flash when the exposure is correct.
Under the left hand edge of the focusing screen an indicator light shows when the flash is
ready to be operated and also confirms if the flash output was sufficient to give a correct
exposure. The flash/strobe unit powers the camera's electronics and also the flash/strobe
adaptor, when that is used.
Setting the film speed for TTL/OTF flash
The film speed is set via the ISO selector. This is marked in ISO/ASA settings from 64 − 4000.
Note that certain films require compensation due to differences in reflective properties of
various emulsions. In these instances, the compensation can be made by changing the film
speed selector setting. The amount of compensation has to be determined by experiment.
Alternatively you can replace the magazine with the Rear cover MultiControl for a few test
exposures. The grey surface acts as an 18% grey card to provide a well-balanced starting
point for exposures.
Please refer to your flash/strobe unit's operating instructions for more information about
other functions when using an automatic flash light-metering that conforms to System SCA
flash/strobe photography with flash sensors, or with non−automatic flash/strobe units.
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