Film, as well as video,
often exhibits a greater sensitivity to what is to us invisible, ultraviolet
light.This is most often outdoors,
especially at high altitudes, where the UV-absorbing atmosphere is thinner;
and over long distances, such as marine scenes.
It can show up as a bluish color cast with color film, or it can cause a
low-contrast haze that diminishes details, especially when viewing far-away
objects, in either color or black-and-white.
Ultraviolet filters absorb UV light generally without affecting light in
the visible region.
It is important to distinguish between
UV-generated haze and that of air-borne particles, such as smog.
The latter is made up of opaque matter that absorbs visible light as well
as UV, and will not be appreciably removed by a UV filter.
Ultraviolet filters come in a variety
of absorption levels, usually measured by their percent transmission at 400
nanometers (nm), the visible-UV wavelength boundary.
Use a filter that transmits zero percent at 400 nm, such as the Tiffen
Haze 2, for aerial and far-distant scenes; the Tiffen Haze 1,
transmitting 29% at 400 nm, is fine for average situations.
These filters are ideal in helping
to protect your camera or camcorder lens against dust, moisture, fingerprints,
scratches and damage. They may be kept on your camera at all times.
The Tiffen UV Protector filter
is the most popular protection filter. It provides the basic reduction of
UV light and is also available as a multi-coated filter, or in thin ring
lens mount for wide angle lenses, and in multiple filter kits.
The Tiffen Sky 1-A is a popular
general use filter with a pink tint for added warmth and better colors.
It is especially helpful when shooting in outdoor open shade and on overcast
days. The Sky 1-A absorbs almost half of UV light. The Sky 1-A is also
available as a multi-coated filter, and in thin ring lens mount for wide
angle lenses.
The Tiffen Haze-1 is the
best general purpose UV control. It eliminates UV problems from most situations
where increased haze tends to wash out color and image clarity. The Haze-1
reduces excessive blue by absorbing almost 3/4 of UV light. The Sky 1-A
is also available in thin ring lens mount for wide angle lenses.
The Tiffen Haze 2A absorbs
virtually all UV light. It reduces haze more than the Haze-1. Perfect for
use in high altitudes and along bodies of water, the Haze 2A is also ideal
for aerial shots, mountain scenes and marine scenes. It maintains color and
image clarity.
The Tiffen UV 17 filter was
created for the technically-minded image maker who wants to absorb most but
not all UV light. It absorbs slightly less UV light than the Haze 2A.
The Tiffen Warm UV combines
the benefits of the UV 17 with the Tiffen exclusive 812 Color Warming Filter
for added warmth. An f-stop compensation of 1/3 is recommended.
The Tiffen Company,
LLC
90 Oser Avenue, Hauppauge,
NY 11788
http://www.tiffen.com/
email: techsupport@tiffen.com
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