Spot Meter
e spot meter pattern enables you to read the exposure for a small area or spot in the
viewfinder, usually 5% or less of the center of the frame. Not all cameras include a spot
meter option, but those that do allow the photographer to set the exposure on an ele-
ment in the composition rather than on the scene as a whole.
e most practical method for spot metering is to point the metering area at the object
in the scene that is most important to you, and then to use exposure lock. You can then
recompose the scene in any way you want, knowing that the most important element
in the picture will be exposed properly.
Some cameras have partial metering instead of a true spot meter. Partial metering
behaves the same way as a spot meter, but the metering area is bigger. Spot meters usu-
ally read 5% or less of the viewfinder, whereas partial metering patterns typically read
about 10%.
TIFF is the acronym for Tagged Image File Format. See File Formats (Still Images) earlier
in this chapter.
Timed Value (Tv) Mode
Often referred to as shutter priority, this setting is commonly available on advanced
amateur and pro-level cameras. is setting is designated by Tv or sometimes simply
“T” or “S”. Tv enables you to set the shutter speed and lets the camera figure out the cor-
responding aperture setting. A common use for Tv is for sports photography, in which
the action is frozen with a fast shutter speed.
Tv is also useful for situations that demand a very slow shutter speed, such as to create
a soft, dreamlike effect with running water. Here are a few scenarios where you might
want to switch to Tv mode:
Sports events A fast shutter speed of 1/500 or 1/1,000 of a second will “stop the
action.” You’ll need plenty of ambient light to use these settings. In a pinch, you can
increase your ISO speed setting to 400 to make your camera more light-sensitive, but
remember that you’ll also gain image noise as part of the bargain.
Children playing outdoors A fast shutter speed of 1/250 or 1/500 of a second will
help you record children at play. If you feel like you’re missing good shots because
of shutter lag (delay from the moment you press the shutter to when the picture
is actually recorded), try using focus lock to shorten lag time. You may also want to

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