The Tiffen T1/2 IR Filter is a near-infrared to infrared control filter that is designed for digital cinematography. Many digital motion-picture cameras are designed to maximize their ability to capture red hues, and in that process near-infrared or infrared contamination may occur. If the proportion of near-infrared or infrared light that reaches the sensor of a digital cinematography camera becomes too great, the results can show unwanted color shifts, particularly in dark areas of the frame such as shadows where the appearance of black is dominant.
When the Tiffen T1/2 IR Filter is used, near-infrared light waves beginning at 680nm are blocked by approximately 45%. Infrared light waves at higher frequencies are further impeded until nearly flat attenuation is achieved at 775 to 800nm. This process helps to ensure that the light that falls on the camera's sensor is limited to the visible spectrum. Potential near-infrared or infrared color shifts are prevented or minimized, which preserves color accuracy throughout the frame. While a Tiffen T1/2 IR Filter is sufficient for many cameras, others may have sensors that require a higher degree of near-infrared and infrared control, such as that provided by a Tiffen T1 IR Filter.
This filter is constructed from Water White glass for increased clarity as well as color fidelity. It is made using ColorCore technology, a process that involves laminating the filter substrate between 2 pieces of optical glass, grinding flat to a tolerance of 1/10,000th of an inch.
TIP HOW TO PROLONGING THE LIFE OF YOUR FILTERS
Filters, like all crafted optics, are susceptible not only to breakage, but to premature aging caused by environmental factors. Most filters are made up of several layers of materials consisting of glass, dyes, optical cements, chemical compounds, particles etc. Even with protective measures employed, there are many factors that can still affect the longevity of the filter: moisture (prolonged exposure to humidity), excessive heat and excessive light are the most common environmental causes that can affect the filter’s chemistry over time.
To
protect your filters and keep them in great working condition for a
long time (along with the rest of your camera gear) we recommend making
sure to keep the filters stored in a dark, cool, and dry place when not
in use. The use of filter pouches or specialized cases will also keep
your filters safe from breakage when not in use. If you are in a humid
environment, the addition of fresh silica gel packs or a dehumidifier in
the room they are stored is also highly recommended. Protecting your
filters as you would your camera lenses will ensure many years of use of
your filters.
What do you recommend cleaning filters with?
Hand
blower first, if it's just light dust,that usually handles it. If you
need to clean further, a Kim Wipe sprayed with Tiffen/Pancro Lens
Cleaner, work in a circular motion from the middle out.
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