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No matter how good the filter or the
camera lens that is attached to it, there is always some problem with
dust, fingerprints, dirt and grease smudges that would interrupt with
the quality of the picture. A really dirty filter or camera lens could
even account for up to a 50 percent loss in lens sharpness and
contrast, causing visible focus shifts, which will all degraded the
sharpness of the image.
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There are a lot of times that even
serious photographers meticulously and gingerly clean the front element
of their prized lens then grab on a camera filter, wipe it off with
their shirt and started to screw the camera filter into their camera
lens. It is these very individuals who come to me weeks later
complaining bitterly about what they consider to be unacceptable images
and ask for explanations.
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The truth is that for some inexplicable
reason almost all of us operate as if filters are not part of the
optical picture-taking system. We don't treat them in the same way we
do prime lenses. We treat filters as we treat our sunglasses which are
once over lightly. We have to keep in mind that camera filters is part
of the optical system in the whole picture taking process and we need
to have the habit of cleaning filters similar to how we clean camera
lenses. Otherwise, we are not going to get the quality picture that we
want, we might as well just leave the filters aside.
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