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SOFT BOX PHOTOGRAPHY
LIGHTING
A Soft box is a type of photographic
lighting device, one of a number of photographic soft light devices.
All the various soft light types create soft diffused light by
directing light through some diffusing material, or by "bouncing"
light off a second surface to diffuse the light. The best known
form of bouncing source is the umbrella light where the light
from the bulb is bounced off the inside of a metalized umbrella
to create a soft indirect light.
A "soft box" is an
enclosure around a bulb comprising reflective side and back walls
and a diffusing material at the front of the light.
The sides and back of the box
are lined with a bright surface - an aluminized fabric surface
or an aluminum foil, to act as an efficient reflector. In some
commercially available models the diffuser is removable to allow
the light to be used alone as a floodlight or with an umbrella
reflector.
Soft boxes range in size from
less than a foot square (30 cm x 30 cm)to huge soft boxes called
lightbanks. One major manufacturer offers units where the illuminated
diffusing surface is 15 x 40 feet (4.6m x 12.3m). These very
large units are typically hung over large studio sets to provide
broad, even, well controlled light. These lightbanks are best
known as light sources for studio photography for the automotive
industry.
Photographers choose soft box
light sources for the soft even light they throw and for the
even highlights they create. The quality of light closely resembles
that of the light transmitted through a window; the illumination
comes from a (usually) evenly illuminated surface. Soft box lighting
de-emphasizes lines and blemishes on the face of a human subject.
Soft box lighting provide bright, even lighting, smooth broad
highlight reflections in product photography, and gentle transitions
from the illuminated areas to the areas of shadow. Reflections
are of great importance when photographing shiny polished surfaces,
reflective metal surfaces, and transparent materials like glass.
The image of the highlight on such subjects is really a reflected
image of the lightsource.
Soft boxes are often easier
to manage than umbrellas when it comes to controlling the amount
of light that falls on the backdrop or background of an image.
A softbox can be 'feathered', or aimed to direct stray light
away from the background. "Barn doors" and "honeycomb
grids" can also be used to restrict the area illuminated
by soft boxes.
A soft box can be used with
either flash or continuous light sources such as fluorescent
lamps or "hot lights" such as quartz halogen bulbs
or tungsten bulbs. If soft box lights are used with 'hot' light
sources, the user must be sure the softbox is heat rated for
the wattage of the light it is attached to in order to avoid
fire hazard.
SOURCE: http://en.wikipedia.org
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