Portable
Flash systems have been developed in much a similar manner
as 35 mm SLR systems with many interchangeable parts. The
main flash head is usually detached from the camera and while
it can be used along side the camera on a bracket that fits
into the base of the flash, it can also be positioned some
distance away to give a greater range of lighting options.
A dial allows the unit to be used on manual where the power
can be varied in one stop settings, or auto settings where
the computer sensor establishes the exposure depending upon
the asa and the distance the subject is from the camera. |
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| The
power for these units often comes from a battery pack that can
be slug on the photographers shoulder via a strap. This unit
may also contain the capacitor and is connected to the flash
head via a power cord. |
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| While
the flash head has a sensor built in , an accessory that comes
with these units might be a remote sensor that can be attached
to the camera hot shoe to control the light during the exposure,
but allow the flash head to be positioned to give side lighting
on the subject. |
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| Some
units have a built in Zoom head where a special screen is moved
in or out to focus the light for the appropriate lens used on
the camera. It might zoom from a 24 mm lens setting , where
the light is directed over a wider area to a 135mm lens setting
where the light is directed in a narrow beam. With some units
this comes as an accessory that is fitted onto the flash head.
These attachments often allow for coloured filters to be located
in a slot in the side. |
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