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Light
and depth of field
By Jakob Jelling
Snapjunky.com
With such a fantastic device as the digital camera for the
recreation of magic in arts, a lot of care needs to be taken so
as to maintain the perfection of the end product. This
perfection is not only obtained by the artistic feeling of the
photographer but also with the intricate knowledge of every
minute aspect of the medium of creation of art (in this case the
digital camera). And these minute aspects play a vast role in
defining the ultimate perfection. The digital camera, light and
depth of field are one such factor that would come into light in
this subsequent discussion. Basically, the depth of field is a
measurement of the acceptable sharpness. Yet this is very
strictly a personal preference, and varies from person to
person. Thus to be more formal, the depth of field can be
defined as the area inside an image that demonstrates an ample
sharpness that can be considered more or less in focus. So the
depth of field is the range of distance, measured along the lens
axis, as per which the image is caused to be sufficiently well
and sharp in the photograph. The rest is as follows!The depth
of field defines the zone where all elements show clearly from
foreground to background. Three factors control the depth of
field in an image, they are the distance of the subject, the
focal length, and the
aperture used to capture the
photograph. For people using compact digital cameras, one of the
subjects of out of the ordinary interest is the depth of field
because depth of field is more easily said than done to control
with a compact digital camera than with earlier conventional
analog film cameras. The minute imaging sensors of compact
cameras need the use of short focal lengths, and this in
sequence gives these compact digital cameras an extraordinarily
long depth of field when compared to other cameras. Thereby,
with intent obtaining a shallow depth of field is more
complicated.
Considering a general acceptable fact, the depth of field
decreases, as the image gets nearer to the camera. This means
that as the focal point reaches closer to the lens, the
achievable scope of the depth of field ebbs. On the other side,
if the image is far enough distant from the camera, and for
digital cameras, this must not be very far, the depth of field
approaches out to infinity. Another important point to be noted
is that the depth of field is proportional to the lens opening.
Having discussed the above important aspects of the light and
depth of field of a digital camera, it is clear that the minute
details make such great subjects whose knowledge becomes equally
important for making appropriate use of the fantastic device,
the digital camera! And the digital camera, light and depth of
field comes out to be such important factors that can make all
the difference if a photographer remains oblivious about this
knowledge. A small factor thus can meal a big divergence!
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