(Available) TIFFEN ND9 IR 4 x 5 1/2 inch Filter
(Available) TIFFEN ND9 IR Filter. 4 x 5 1/2 inches (10 x 14 cm). Includes case.
Description from the Tiffen official website:
The Tiffen 4 x 5.65" Full Spectrum IRND 1.2 Filter is a combination of both an infrared control filter and a 1.2 neutral density filter. An IRND is ideal for HD cameras, which have greater low-light sensitivity and, subsequently, an increased susceptibility to IR contamination. When using a standard neutral density filter to counter the increased light sensitivity afforded by the HD sensor, the effects of infrared pollution become more apparent. This filter combines an ND filter with a comparable IR control filter to eliminate the spill of infrared light reaching the sensor while still maintaining the extra exposure benefits of a neutral density filter.
This filter is constructed from Water White glass and is made using ColorCore technology, a process that involves laminating the filter substrate between two pieces of optical glass and grinding flat to a tolerance of 1/10,000th of an inch. This filter measures 4 x 5.65" / 101.6 x 143.5mm.
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