Rollei 121 BC Manual Del Usuario página 22

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Use of very short flash times
Switch on automatic system. Use a short flash distance (minimum
40 cm / 16
In), choose a light background and if possible a light
subject. With a shorter · flash distance, flash duration is also
shortened to a minimum of about
'ho,ooo
second .
For extremely rapid movements: Use open flash method and a
suitable contactor which is operated by the subject itself at the
decisive moment.
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Care and maintenance
Remove batteries from flash unit if not in use for longer periods.
Clean reflector diffuser and dust flash unit externally. Keep battery
poles and contacts inside of cover free from oxydes.
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Batteries
Dry batteries should be exchanged in pairs only. Known makes in
fresh condition will ensure optimum flash
operation .d~ lkal~~f.
s.anese cells are highly recQ1IllIlefl-dE!"1f (minimum self Ischar .
stored or not in use for longer periods)
-+
page 21.
In extreme cold carry flash gun next to body for speedy readiness.
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