Metz MECABLITZ 44 AF-4 O, Руководство по эксплуатации

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5.6.3 Slow synchronisation / SLOW
In certain operating modes, some cameras permit slow flash synchronisation
(SLOW) which will provide added prominence to the background at lower
ambient light levels. This is achieved by matching the shutter speed to the
ambient light. Accordingly, shutter speeds slower than the flash sync speed
(e.g. shutter speeds up to 30 s) are automatically adjusted by the camera.
Some cameras automatically activate SLOW synchronisation in connection
with certain programs (e.g. night shots program, etc.) or permit slow syn-
chronisation to be set (see operating instructions of the camera). No settings
are made on the flash unit nor is there any display for this mode.
Use a tripod to avoid camera shake with slow shutter speeds !
5.6.4 FP high-speed synchronisation HSS
Focal plane cameras (such as E-1 and E-300) support FP high-speed syn-
chronisation in conjunction with the flash unit 44AF-4 O. High-speed syn-
chronisation is then indicated by the flash unit’s LC display panel by the let-
ters „HSS“. Depending on the camera model, „FP“ will additionally appear
in the camera’s viewfinder or on the camera’s display panel (see the camera’s
operating instructions).
FP high-speed synchronisation HSS can additionally be activated on the flash
unit in the TTL and manual flash mode M. In the manual flash mode you can
also work with a partial light output setting (MLo HSS).
This synchronisation mode permits a flash unit to be used also at shutter
speeds faster than the flash sync speed (depending on the given camera
model). This is particularly interesting in portraiture with very bright ambient
light when the depth of field is to be limited by a wide open lens.
Due to physical reasons, FP high-speed synchronisation significantly reduces
the guide number and the maximum flash range. You should therefore pay
attention to the maximum flash range given on the flash unit and by its tech-
nical data.
With FP high-speed synchronisation (HSS), the guide number and the
maximum flash range of the flash unit are additionally dependent on
the shutter speed.
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Setting procedure
• Link the flash unit with the camera and switch on.
• Lightly touch the camera’s shutter release so that data can be exchanged
between the flash unit and the camera.
• Continue depressing the „Mode“ button (Fig.1) on the flash unit until the
required flash mode - TTL, M or MLo – as well as HSS flash on the unit’s
display panel.
• Storage is automatic after 5 seconds.
6 Flash unit and camera functions
6.1 Flash readiness indication
The flash-ready symbol ((Blitzsymbol)) lights up on the flash unit when the
flash capacitor is charged, thereby indicating that flashes can be fired for the
next shot. Flash readiness is also transmitted to the camera for corresponding
display in the viewfinder or on the display panel.
If a picture is shot before flash readiness is signalled in the camera’s viewfin-
der, then the flash unit will not be triggered so that the exposure may be
incorrect if the camera has changed over to flash sync speed in the meantime
(see 6.2).
6.2 Automatic flash sync speed control
On cameras with a focal-plane shutter (e.g. E-1 and E-300) the shutter
speeds are automatically limited to the camera’s flash sync speed (see the
camera’s operating instructions). This means that it is not possible to set shut-
ter speeds that are faster than the flash sync speed. Exception: Flash mode
with FP high-speed synchronisation HSS (see 5.6.4).
Various cameras have a sync speed range, e.g. 1/30th sec. to 1/180th sec.
(see the camera’s operating instructions). The actual sync speed set by the
camera depends upon the camera mode, the ambient light and the focal
length of the lens used.
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704 47 0118-A2 44 AF-4 O 16.08.2007 15:01 Uhr Seite 60