Digital Photography 101
Chapter 5: Lighting Systems
5.14: Tungsten lights
Provides specific colour temperature light at a fairly even rate.
The two types of illumination, which are most popular, are 3200
degree Kelvin and 3400 degree Kelvin. Daylight and flash colour
temperature is 5500 so a shot set to daylight white balance or daylight
balanced film will give a red colour casting. See chapter 1 for
more information on white balance and converting filters used on
film cameras. They work in the same manor as a domestic light bulb
making them the most popular lighting for studio photography. They
can get very hot so take care when using them close to reflectors
and other flammable material. They also burn out quickly with 100
to 200 hours being typical and a bulb can cost up to $30 so don't
waste them by leaving them on unnecessarily. The big advantage is
they are quick and simple to use.
5.15: Halogen lights
Originally developed for video cameras for the film industry they
are also well suited to studio photography. Faster shutter speeds
and smaller apertures are possible because they are much brighter
then tungsten at the same wattage, and the light produced is much
closer to daylight in colour temperature. They also last a lot longer
but are more expensive to replace and buy. They are a lot more efficient
on electricity than tungsten lights but there are fewer accessories
available for them. Whatever lighting you use you must treat it
with utmost care. They are easily damaged and sometimes are the
cause of fires.
Now we have taken our photo we will need to transfer our photos
to the computer and then undertake postproduction work. This was
once the common domain of the chemical darkroom. Now we use software
and computers. We will study this next.
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