Camera Lenses

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Camera Lenses
Brought to you by
Dylan Deweerd
Aleks Mortlock
Scott Bursey
and,
Robert Derman
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Types of Lenses
There are seven (7) main types of lenses
1. Standard
2. Telephoto
3. Wide Angle
4. Zoom
5. Portrait
6. Macro
7. Fisheye
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Standard Lens
Standard When using a 35mm camera, a 50mm lens is
referred to as a standard lens since it has about
the same angle of view as the human eye. A zoom
set in the standard lens range will produce an
image that is close to the same perspective as
the original scene.
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Telephoto
TELEPHOTO   Lenses that give a narrower angle
of view than a standard lens are called telephoto
lenses, though strictly speaking this is a
particular way of making lenses. Most long focal
length lenses in use on cameras today are
telephoto lenses. Taking pictures through a
telephoto lens is like using a telescope or
binoculars - it makes everything look larger.
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Wide Angle
WIDE ANGLE For a 35mm camera, lenses from 24 to
35mm re generally thought of as wide-angles, and
those under 24 mm as ultra wide. The widest
rectilinear lens available for 35mm is a 12mm
lens for rangefinder systems, and around 16mm for
SLRs. Wider angles of view can be obtained either
from various panoramic cameras or by allowing the
subject lines to curve - giving a fish-eye
effect.
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Zoom
ZOOM Zoom lenses are very convenient. The
equivalent of two or more fixed focal length
lenses in one unit. The maximum aperture of some
zoom lenses changes as you alter the focal
length, but through-the-lens (TTL) metering takes
this into account to give correct exposure.
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Portrait
PORTRAIT A compound camera lens with a relatively
high aperture.
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Macro
MACRO The macro lens just focuses a lot closer
than standard non-macro lenses do. Most macro
lenses today will focus close enough to produce
life-size (11) images on the film
-Baru-orchids
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Fisheye
FISHEYE A fisheye lens renders straight lines
which don't run through the center of the frame
as curved (though lines running through the
center remain straight). Objects at the edges of
the frame are not stretched, but they are
distorted. It's easy to make a lens with a
diagonal coverage of 180 degrees ("full frame
fisheye") or even with a horizontal, vertical and
diagonal FOV of 180 degrees ("circular frame
fisheye") - though this results in a circular
image with the rest of the frame dark.
And here is a picture taken with a fisheye lens ?
? ? ? ?
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The End