White Balance
White balancing is balancing the way your ccd or cmos chip interprets
the “color” of the light you’re using. Therefore , this
should be a step you add to your pre-shoot set-up , EVERY time you shoot . We
know that the color characteristics of light are measured in Kelvin units
(sometimes called degrees).
Average daylight falling somewhere between 5000K and
5500K . Your camera comes pre-loaded with a number of “white balance”
settings . These are to help you match the light source you are using . As cameras
are being up-graded manufacturers are adding more and more “white” settings
to their software . To obtain the best possible image quality , it is
essential that you use your white balance settings correctly .
Auto White Balance or "A"
While the “A” white balance setting will give you good
results in many different situations , you should understand that it CAN be fooled
in some situations. If you photograph in a variety of locations you will
want to test the “A” and your other settings thoroughly . This is even more important
for those of us who do mostly studio work . If you use the A setting in the
studio with strobe , you are balancing your color to your modeling lights. Your
strobes may or may not be the same color (in MOST cases NOT !) this WILL make a
difference in your image quality . Again , TEST and Re-TEST your settings
BEFORE you shoot a large job!!!!
Custom White Balance
Some cameras
come with the ability to create your own white balance. We recommend doing this for
each different lighting
set-up that you use. Your camera’s instruction manual
will tell you what values for white and
black, and sometimes average grey , that use should be using . i.e. white is usually
set somewhere between 245 and 255. Again, the manufacturers
setting are guides ,change them if you aren’t happy with your results
but TEST your settings. When you do
your white balance use a “standard” target. We recommend a
Kodak grey card or Macbeth color checker . Which ever
target you use, when you balance , fill
your frame with that target. Be careful NOT to throw a shadow
over your target while photographing. Make sure your
target is in the SAME place your subjects will be . We recommend using the grey
card to balance and then shoot one frame with your first subject holding the
Macbeth color checker. This will give your lab a good reference to use when
color correcting your jobs. If you change your lighting set-up then you should
do a new white balance AND give us a new color reference.
EXPOSURE
As with all photography , exposure is key to getting
good results . If you have been using negative film for your photography , say
goodbye to the wonderful exposure latitude you’ve enjoyed. Digital
requires precise exposure. It responds very much like transparency or slide
films. This is especially true in the highlight areas. Washed
out highlights CANNOT be put back. Digital images do not tolerate
over-exposure very well. Under-exposure up to a half stop is correctable ,
USUALLY. This means if you aren’t using an exposure meter to set
your lights , you SHOULD be. You want repeatable uniform results , this
will help you obtain those. If you ARE using an exposure meter , time to
re-test its accuracy. Many meters are off quite a lot , but because of the
latitude of negative film , your results have been good.
That will NOT be the case with digital
equipment.
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