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Photography -
Photographic Filters
By
Michael Russell
Filters. Do we
need them? What are they good for? How many types are there?
Are some better than others? How do you know which one to use
and for what?
Lot's of
questions. Hopefully, by the time you are done reading this,
you'll have a few answers to go along with those questions.
Actually, the
most common use of filters is to protect the lens of the
camera, some of which are very delicate. Most photographers
use either UV, 1A or 1B filter for this purpose. For example,
if a delicate lens gets hit with too much sunlight, the UV
light can damage the lens. The UV filter keeps that particular
light from reaching the lens. It's kind of like the principal
of wearing sun glasses so that your eyes don't get damaged by
the sun.
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But there are
also other types of filters that you can use that have nothing
to do with protecting your lens but in getting certain types
of effects from your photos.
First we have
what are called correction filters. There are many different
types of correction filters and while we can't possibly go
over each type, we'll cover a few just to give you an idea of
what they do.
One example of a
correction filter is a green filter. This is used for black
and white film because this film is less sensitive to red
light than the human eye. To correct this we use a light green
filter, though a yellow filter can also be used.
There are
actually many different color filters depending on the kind of
shot that you are going for. If you've ever watched movies
with scenes that seemed to be shot to make the scene look like
a bright blue, this is done through the use of a color filter.
This is one of the most common filters used for photography
both in still photos and in movies and television.
Another type of
filter that is very common is what is called the temperature
filter. These filters are used to produce either a cooling or
warming effect. One example of use would be on a photo taken
on a very cold snowy winter day. A warming filter would be
used to give the shot more of a warm effect in spite of the
snow on the ground.
Effects filters
are very widely used by photographers who are looking to add
some zip to their photos to make them less bland. These
effects include things like starbursts and diffusions. Care
must be taken when using effects filters as they can become
tedious after a while. Combining certain effects can be very
effective.
Polarizing
filters are used to cut down reflections from various light
sources like the sun. These filters actually produce an
exaggerated color saturation in images. Therefore they should
be used carefully. While taking photos with these filters,
they need to be rotated while you observe the image in order
to get the desired effect.
These are the
most common types of filters, but there are others. By
experimenting with each you can get a very good idea of the
types of effects that you can get with your camera. Before you
know it, you'll be taking photos for NASA.
Michael
Russell
Your
Independent guide to
Photography
Article
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