E27
• High-speed sync is cleared when the high-speed-sync button is
pressed again, and a shutter speed faster than the sync speed can no
longer be set.
• It is recommended that photos be taken in bright locations.
• The flash range with high-speed sync is less than for normal flash
photography. Check that the subject is within the flash range before
taking the photo.
It is possible to figure out the accurate flash range with high-speed
sync by using the table of HSS flat flash (ISO100) on the page 46.
Divide the guide number by the aperture. This is the maximum dis-
tance of the flash range.
For example, when applying the shutter speed of 1/500, with a 28mm
focal length, the guide number is 8 according to the table. Devide 8
(the guide number) by 4 (the aperture), which equals 2. The flash
range would be 2 m in this case.
The number will be doubled, when using ISO400 film.
• High-speed sync cannot be used with ratio flash, or bounce flash.
• When using a flash meter or color meter, high-speed sync cannot be
used because it interferes with the proper exposure.
• High-speed sync lamp of the flash might be lit even with a camera
which dose not have high-speed sync. In that case, high-speed sync
dose not work.
HIGH-SPEED SYNC
E26
HIGH-SPEED SYNC [HSS]
High-speed sync
Normal flash
Press the high-speed-sync but-
ton.
• The high-speed-sync lamp glows on
the control panel.
High-speed sync eliminates the restrictions of flash sync speed, and
allows you to use flash over the entire shutter speed range of the
camera. The selectable aperture range is increased, allowing portrait
shots with flash in which the aperture is opened to leave back-
grounds out of focus and thus accentuate the human subject.
• The Maxxum STsi, QTsi, 400si, 300si and Dynax 500si, 500siSuper,
404si, 303si, 300si do not support this function, and high-speed sync
therefore cannot be used.
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