Understanding Light and Filters 331
Figure 17-11 Glamour in wedding photography. This is a wedding portrait that beautifully
conveys the romance of the wedding day. The diagonal composition makes a moving image
different from the ordinary portrait. The out-of-focus fl owers on the left keep the eye in the
picture focused on the beautiful face and eyes of the bride. This is photographed with a Softar
fi lter on the lens. (Photo by Andy Marcus.)
VISIBLE AND INVISIBLE LIGHT
The light that is visible to the human eye has wavelengths from about 400 (violet) to about
700 nm (red). Beyond the red is infrared radiation, which is not visible to the eye but can
be recorded photographically as discussed in Chapter 3 and at the end of this chapter. At
the other end of the spectrum, beyond the violet, is ultraviolet radiation, which is also used
in photography. The ultraviolet wavelengths are divided into three bands: long wave (320–
400 nm), middle wave (280–320 nm), and short wave (ultraviolet 200–280 nm). Figure 17-12
illustrates the wavelength spectrum.
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