Wyoming, WY
The State of Wyoming is a state in the western
region of the United States of America.
The easternmost section of the state is a region
known as the High Plains due to its altitude
above sea level, while the majority of the state
is dominated by the mountain ranges and
rangelands of the Rocky Mountain West. Wyoming
is the least populous U.S. state.
The United States Census Bureau estimates that
the state population was 515,004 in 2006, a 4.3%
increase since 2000.
The capital and the most populous city of
Wyoming is Cheyenne. Residents of Wyoming are
known as Wyomingites.
Geography
Wyoming is bordered on the north by Montana, on
the east by South Dakota and Nebraska, on the
south by Colorado, on the southwest by Utah, and
on the west by Idaho.
It is the tenth largest state in the United
States in total area, containing 97,818 square
miles (253,348 kmē) and is made up of 23
counties.
From the north border to the south border it is
276 miles (444 km); and from the east to the
west border is 375 miles (603 km). The Great
Plains meet the Rocky Mountains in Wyoming.
The state is a great plateau broken by a number
of mountain ranges. In the northwest are the
Absaroka, Owl Creek, Gros Ventre, Wind River and
the Teton ranges.
This article is licensed under
the
GNU Free Documentation License.
It uses material from the
Wikipedia
article "Wyoming".
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Understanding Exposure metering
by
Sean Jordan
Exposure metering . Many cameras these days have
exposure meters built into them and this can be a
great convenience. On the whole they are a reliable
guide, but there are subjects of an unusual nature
that call for some variation from the indicated
figure. Suffice to say that it is desirable not to
follow a built-in meter blindly but to regard it as
a convenient guide rather than an infallible
pointer.
On
some cameras the meter merely gives an indication of
the exposure required and the aperture and/or
shutter speeds are set by hand to correspond. On
more advanced models a pointer activated by the
exposure meter is visible in the viewfinder and one
turns the aperture ring or shutter speed dial until
another pointer coincides with it, at which point
exposure will be correct for an average subject.
On
so-called automatic cameras the user merely sets the
shutter speed he wants to use and the meter itself
opens or closes the aperture to the stop that will
give accurate exposure on an average subject. With
the introduction of shutters operated electronically
instead of by a train of mechanical reaction, it has
been possible to make cameras on which the user sets
the aperture he desires and the exposure meter
adjusts to the shutter speed accordingly. All of the
latter are single-lens-reflex cameras and, since
they measure the light coming through the lens
itself, they are often called TTL (through-the-lens)
to distinguish them from other SLR
(single-lens-reflex)
However, automation has become quite common on
ordinary non-reflex miniature cameras as well. They
usually have a sensing cell situated on or near the
lens mount so that it measures the light direct from
the scene instead of from behind the lens. Such
cameras are quite reliable if adjustments are made
when faced with the unusual circumstances described
on exposure calculation. It is most desirable when
selecting a camera of this type to ensure that it
has a manual override to cope with such instances.
Provision is made on all cameras with integrated
exposure meters to make the necessary adjustments
for different speeds.
About the Author
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