Shutter speed can be defined as a length of time
required for a shutter to be opened; in this the total exposure
is directly proportional to the interval of light reaching images or film
sensor. The shutter speed can also be
defined as the amount of time the shutter is kept opened. The upper diaphragm of a lens big or small
values and timing of the shutter curtain.
These two perform the work of regulating the light entered in to the camera and exposed.
How to Measure the Shutter Speed?
The measurement of
shutter speed is done in seconds. The photograph which is taken in daylight is
1/125th of 1 second.
The way the movement appeared in the picture is changed by shutter
speed.
To freeze fast moving
object short shutter speed is used, for example at sporting events.
To blur a fast moving
object for artistic effects very long shutter
speed is used.
Camera shutters also
include two other settings for long exposures that is:
•
B for bulb -
As long as the shutter release is held it keeps the shutter opened.
•
T for time -
Until the shutter release is pressed again it keeps the shutter opened.
To short exposures
time the term "speed" is referred to as fast, and slow for long
exposure times. Reciprocal time is often designated for shutter speeds, for
example 60 for 1/60 s.
•
Very slow shutter
speed is given to very few cameras that are measured in
seconds and not in fractions of seconds like a second, 10 seconds, 30 seconds
etc.
•
The option to shoot
in B or BULB mode. The shutter is opened for as long as you hold
down this mode.
Factors that affect
the total exposure of a photograph /shutter speed:
1) The scene
luminance.
2) The aperture size
(f-number),
A fast shutter speed
requires a larger aperture (smaller f- number), for any given total exposure.
A longer length of
time can be compensated by small aperture (larger f- number) for a low shutter
speed
Different kinds of work performed by shutter speeds
Different selection
of shutter speeds will give you different kind of visual effect on a final
photograph.
Actions can be frozen
by using fast shutter speed, whereas images can be blurred using slow speed.
More powerful visual
impact sometimes can be created by slow shutter speed, than images taken with
action-freeze high shutter speed.
Precautions to be taken for taking better pictures
1) While shooting the
pictures of individuals, turn the camera on its side. This helps in reducing
the wastage of lots of film on the background.
2) While taking
sunset pictures turn the flash off to avoid a result that's dark.
3) If you are
carrying a camera to a beach see that it's well protected inside a carry case,
because the slightest contact of sand with the camera can jam up the camera.
4) When you are
taking photos in the dark interiors such as
clubs or pubs tell the person to move towards bright light for few moments
before you take a flash picture. By
doing so one can reduce the risk of red- eye.
Shutter speed helps
in taking good pictures even in unfavorable climatic conditions. It also helps
in taking photos of the moving objects.
©2012 Crossfire Photography, LLC. All Rights Reserved.
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